44 Seo Sem jobs in Saudi Arabia

Digital Marketing Specialist

Riyadh, Riyadh ALKAFFARY GROUP

Posted 6 days ago

Job Viewed

Tap Again To Close

Job Description

3 weeks ago Be among the first 25 applicants

We are hiring a Digital Marketing Specialist for a full-time, on-site position . The role involves managing and optimizing digital marketing activities, including web analytics and online campaigns, with a strong focus on improving performance and reducing CPA (Cost Per Acquisition). Collaboration with the content team and regular follow-ups to ensure seamless campaign execution are key aspects of this role.

Our company is rapidly expanding its digital presence, offering an exciting opportunity to contribute to a fast-growing e-commerce and retail ecosystem.

Key Responsibilities:

  • Develop and manage digital marketing campaigns to increase ROI
  • Optimize campaign performance to reduce CPA
  • Collaborate with the content team to ensure cohesive marketing strategies
  • Analyze web analytics and use insights to refine strategies
  • Create and maintain a content calendar and ensure timely execution
  • Stay updated with digital marketing trends and implement best practices
  • Coordinate with the customer service team to address comments and feedback
  • Prepare performance reports and provide recommendations for improvement

Requirements

Proven expertise in web analytics and online marketing .

Hands-on experience with e-commerce platforms such as Shopify , Zid , or Salla , preferably within a retail environment .

Strong familiarity with digital marketing trends , tools, and performance tracking.

Prior experience in the e-commerce or retail sector within Saudi Arabia is a plus.

Demonstrated ability to manage funded campaigns with a focus on increasing ROI and conversion rates .

Seniority level
  • Seniority level Mid-Senior level
Employment type
  • Employment type Full-time
Job function
  • Job function Advertising
  • Industries IT Services and IT Consulting

Referrals increase your chances of interviewing at ALKAFFARY GROUP by 2x

Sign in to set job alerts for “Digital Marketing Specialist” roles.

Riyadh, Riyadh, Saudi Arabia 16 hours ago

Riyadh, Riyadh, Saudi Arabia 21 hours ago

Search Engine Marketing and Paid Search Manager Search Engine Marketing and Paid Search Manager

Riyadh, Riyadh, Saudi Arabia 22 hours ago

Senior Specialist - Social Media (COR435) Marketing Manager - ERP & Digital Solutions

Riyadh, Riyadh, Saudi Arabia 21 hours ago

Riyadh, Riyadh, Saudi Arabia 16 hours ago

Riyadh, Riyadh, Saudi Arabia 18 hours ago

We’re unlocking community knowledge in a new way. Experts add insights directly into each article, started with the help of AI.

#J-18808-Ljbffr
This advertiser has chosen not to accept applicants from your region.

Search Engine Optimization Specialist

Jeddah, Makkah Silverback Sport Equipment

Posted 9 days ago

Job Viewed

Tap Again To Close

Job Description

Get AI-powered advice on this job and more exclusive features.

At Silverback, we are a fitness solution provider offering strength and conditioning equipment and rubber floorings to commercial, hospitality, and home gym owners. Our mission is to enhance the health and wellness of individuals and communities across Saudi Arabia.

This is a Part-time on-site role for a Search Engine Optimization Specialist. The SEO Specialist will be responsible for conducting keyword research, performing SEO audits, building links, analyzing web analytics, and optimizing on-page SEO. They will work closely with the marketing team to improve website performance and search engine rankings.

What You’ll Do:

  • Optimize Arabic website content (on-page SEO )
  • Build and manage high-quality backlinks (off-page SEO )
  • Conduct in-depth keyword research and competitor analysis
  • Monitor SEO performance and implement best practices
  • Collaborate with content, marketing, and web development teams
  • Proven experience in Arabic SEO , including:
  • Deep understanding of SEO tools (Google Search Console, Ahrefs, SEMrush, etc.)
  • Strong written Arabic and basic English communication
  • Ability to deliver measurable improvements in rankings and traffic

If you're an SEO specialist who knows how to rank Arabic content and build strong authority, let’s talk!

Seniority level
  • Seniority level Entry level
Employment type
  • Employment type Full-time
Job function
  • Job function Marketing and Sales
  • Industries Wellness and Fitness Services

Referrals increase your chances of interviewing at Silverback Sport Equipment by 2x

Sign in to set job alerts for “Search Engine Optimization Specialist” roles.

We’re unlocking community knowledge in a new way. Experts add insights directly into each article, started with the help of AI.

#J-18808-Ljbffr
This advertiser has chosen not to accept applicants from your region.

Search Engine Optimization (SEO) Specialist

Jeddah, Makkah Creative Chaos

Posted 9 days ago

Job Viewed

Tap Again To Close

Job Description

Job Summary:
A SEO Specialist in Creative Chaos will be responsible for improving our organic search rankings and providing exceptional search engine optimization services for our company. You will work on enhancing the health of our website via keyword research and content optimization, and carry out offsite SEO activities. You will manage our pay-per-click search campaigns and guarantee their success.

Job Description:

  1. Create effective strategies for search engine optimization.
  2. Oversee and supervise a team of search engine optimization experts.
  3. Lead research for SEO friendly keywords.
  4. Monitor technical search engine optimization issues and help in fixing them.
  5. Optimize the content of landing pages, blogs, and websites.
  6. Direct and coordinate content teams in off-page search engine optimization tasks like link-building and forum commenting.
  7. Analyze insights and create reports on all aspects of SEO including audience, traffic, views, clicks, and rankings.
  8. Collaborate with the Social Media Team during the SEO of marketing campaigns.
  9. Stay up to date with search engine optimization and marketing standards.

Minimum Requirements:

  1. 5+ years of SEO experience, preferably in a software house, E-commerce, or agency.
  2. Bachelors in marketing, advertising, communications, business, or a related area (not required, but a plus).
  3. Proficient with Technical SEO, Content Marketing, and Search Marketing techniques.
  4. Proven track record. Applicants must submit websites that demonstrate their SEO ability and be prepared to discuss.
  5. Expert user of web analytics tools and concepts, particularly Google Analytics and Google Search Console.
  6. Experience using search tools and platforms.
  7. Compelling written and verbal communication skills, a positive attitude, and the ability to thrive in a collaborative environment.
  8. Strong project management and organization skills, ability to prioritize, and manage multiple projects.
#J-18808-Ljbffr
This advertiser has chosen not to accept applicants from your region.

Search Engine Marketing and Paid search Team Lead

Riyadh, Riyadh Gathern

Posted 9 days ago

Job Viewed

Tap Again To Close

Job Description

Search Engine Marketing and Paid search Team Lead Search Engine Marketing and Paid search Team Lead
  • Develop optimization strategies that increase the company's search engine results rankings
  • Perform keyword research in coordination with client business objectives to optimize existing content and uncover new opportunities
  • Provide SEM analysis and recommendations in coordination with elements and structure of websites and web pages
  • Implement link-building campaigns in coordination with client SEO goals
  • Assist in the development and execution of communication/content strategies via social communities in coordination with SEM goals
  • Keep pace with SEO, search engine, social media, and internet marketing industry trends and developments
  • Collaborate with other team members to manage SEM strategy
  • Update content and website links for maximum optimization and search engine rankings
  • Ensuring successful planning, execution, and optimization for key traffic KPIs via paid, organic & own channels
  • Identifying and testing new channels to continue to meet or exceed established critical metrics
  • Working closely with the management to share funnel conversion improvement ideas, feedback & present results
  • Identify opportunities to drive customer value based on actual behaviors through different channels and prioritize them
  • Boost the conversion rates between the full funnel segments by bringing in creative Ideas to boost the KPIs
  • Work with team members to understand data requirements and objectives, resulting in successful deliverables
  • Analyze and report on critical performance metrics


  • Develop optimization strategies that increase the company's search engine results rankings
  • Perform keyword research in coordination with client business objectives to optimize existing content and uncover new opportunities
  • Provide SEM analysis and recommendations in coordination with elements and structure of websites and web pages
  • Implement link-building campaigns in coordination with client SEO goals
  • Assist in the development and execution of communication/content strategies via social communities in coordination with SEM goals
  • Keep pace with SEO, search engine, social media, and internet marketing industry trends and developments
  • Collaborate with other team members to manage SEM strategy
  • Update content and website links for maximum optimization and search engine rankings
  • Ensuring successful planning, execution, and optimization for key traffic KPIs via paid, organic & own channels
  • Identifying and testing new channels to continue to meet or exceed established critical metrics
  • Working closely with the management to share funnel conversion improvement ideas, feedback & present results
  • Identify opportunities to drive customer value based on actual behaviors through different channels and prioritize them
  • Boost the conversion rates between the full funnel segments by bringing in creative Ideas to boost the KPIs
  • Work with team members to understand data requirements and objectives, resulting in successful deliverables
  • Analyze and report on critical performance metrics


Requirements

  • A minimum of 5 years of experience in a related role and in the start-up space
  • Prior experience in a similar role, as well as experience building effective multi-channel PPC, SEO, and SEM.
  • Have solid channel analysis and reporting expertise, including Google Analytics experience
  • You possess excellent analytical skills and leverage data, metrics, analytics, and consumer behavior trends to drive actionable insights & recommendations
  • Professional experience in A/B testing and Data-Analytics
  • Basic understanding of business financials, ROI, and profitability concepts
  • A portfolio of successful growth implementations and interventions
  • Quick learner who can collect, organize, analyze, and communicate data and information
  • Excellent written and oral communication skills, good presentation, and persuasion skills
Seniority level
  • Seniority level Mid-Senior level
Employment type
  • Employment type Full-time
Job function
  • Job function Marketing and Sales
  • Industries IT Services and IT Consulting
Sign in to set job alerts for “Search Engine Marketing Specialist” roles. Digital Marketing & Digital Health Specialist Senior Specialist, Digital Marketing (Bangkok Based, relocation provided) Solution Architect - Digital Marketing & Loyalty

We’re unlocking community knowledge in a new way. Experts add insights directly into each article, started with the help of AI.

#J-18808-Ljbffr
This advertiser has chosen not to accept applicants from your region.

Search Engine Optimization (SEO) Specialist at Creative Chaos Saudi Arabia

Itlearn360

Posted 2 days ago

Job Viewed

Tap Again To Close

Job Description

Search Engine Optimization (SEO) Specialist job at Creative Chaos. Saudi Arabia.

Job Summary:
A SEO Specialist in Creative Chaos will be responsible for improving our organic search rankings and thus, providing exceptional search engine optimization services for our company. You will also be working on enhancing the health of our website via keyword research and content optimization. You will also be responsible for carrying out offsite SEO activities. You will manage our pay-per-click search campaigns and guarantee their success.

Job Description:

  • Create effective strategies for search engine optimization.

  • Oversee and supervise a team of search engine optimization experts.

  • Lead research for SEO friendly keywords.

  • Monitor technical search engine optimization issues and help in fixing them.

  • Optimize the content of landing pages, blogs and websites.

  • Direct and coordinate content teams in off-page search engine optimization tasks like link-building, forum commenting, etc.

  • Analyze the insights and create a report on all aspects of SEO including the audience, traffic, views, clicks, rankings, etc.

  • Collaborate with the Social Media Team during the SEO of marketing campaigns.

  • Stay up to date regarding search engine optimization and marketing standards.

Requirements
  • 5+ years of SEO experience, preferably in a software house, E-commerce, or agency
  • Bachelors in marketing, advertising, communications, business, or a related area (not required, but a plus)
  • Proficient with Technical SEO, Content Marketing and Search Marketing techniques.
  • Proven track record. Applicants must submit websites that demonstrate their SEO ability and be prepared to discuss.
  • Expert user of web analytics tools and concepts, particularly Google Analytics and Google Search Console.
  • Experience using search tools and platforms.
  • Compelling written and verbal communication skills, a positive attitude, and the ability to thrive in a collaborative environment
  • Strong project management and organization skills, ability to prioritize, and manage multiple projects
#J-18808-Ljbffr
This advertiser has chosen not to accept applicants from your region.

Digital Marketing specialist

Riyadh, Riyadh Smart Group Agency SGA

Posted 1 day ago

Job Viewed

Tap Again To Close

Job Description

Job description :

We are currently recruiting a digital marketing specialist for a plastic factory in Riyadh. The role involves implementing campaigns, branding products on platforms such as Amazon and Alibaba, managing social media networks, Google Ads, email marketing, opening new markets, and supporting the achievement of the annual sales plan.

Duties and responsibilities :

  1. Plan and execute all web, SEO/SEM, database marketing, email, social media, and display advertising campaigns.
  2. Sourcing and overseeing the work of external consultants and suppliers, including web developers, videographers, graphic designers, and online agencies that align with the brand.
  3. Create online campaigns on platforms like LinkedIn, Facebook, Twitter, and Instagram to enhance audience engagement.
  4. Oversee all marketing activities and update product listings on platforms like Amazon and Alibaba. Liaise with third-party vendors and agencies for smooth product marketing. Open new markets in Africa and the Middle East through online promotion.

Requirements :

  • BSc degree in marketing or a related field.
  • Fluent in English.
  • At least 3 years of experience in digital marketing, online sales, or e-commerce.

If interested, kindly send your CV to: #digitalmarketing #onlinemarketing #ecommerce #salesonline

#J-18808-Ljbffr
This advertiser has chosen not to accept applicants from your region.

Digital Marketing Specialist

Riyadh, Riyadh .LEZOF Co

Posted 1 day ago

Job Viewed

Tap Again To Close

Job Description

Responsibilities:

  • Develop and execute digital marketing strategies tailored for automotive services and products.
  • Analyze market trends and target audience behavior to choose the appropriate channels per campaign.
  • Create and manage advertising campaigns on:
  • Google Ads (Search, Display, YouTube)
  • Meta Ads (Facebook & Instagram)
  • Snapchat Ads
  • Set and manage campaign budgets, track expenditures, and ensure high return on investment (ROI).
  • Integrate and monitor campaigns using tools like Google Analytics and Google Tag Manager.
  • Track key performance indicators such as:
  • Click-Through Rate (CTR)
  • Cost Per Acquisition (CPA)
  • Conversions
  • Prepare and deliver regular performance reports with recommendations for optimization.
  • Implement and manage remarketing and retargeting strategies to boost conversion rates.
  • Conduct A/B testing for ad creatives and landing pages, adjusting campaigns based on data insights.
  • Continuously optimize keywords, ad content, and visual designs.
  • Collaborate with the design and content teams to ensure engaging and cohesive campaign materials.
  • Coordinate with the sales department to align marketing initiatives with revenue goals.

Requirements:

  • Minimum of 4 years of experience in digital marketing.
  • Strong background in campaign planning, execution, and performance analysis.
  • Proven understanding of customer behavior in the automotive industry.
  • Proficient in using digital marketing tools and advertising platforms (e.g., Google Ads, Meta Ads).
  • Experience in launching and managing new marketing projects is a plus.

Skills

  • Strong analytical and reporting skills.
  • Excellent knowledge of Google Analytics and Google Tag Manager.
  • High proficiency in ROI-focused digital campaign management.
  • Expertise in keyword research and ad copy optimization.
  • Ability to create and execute A/B testing strategies.
  • Familiarity with retargeting and remarketing techniques.
  • Effective communication and collaboration skills.
  • Attention to detail and a data-driven mindset.
  • Ability to manage multiple campaigns simultaneously under tight deadlines.
#J-18808-Ljbffr
This advertiser has chosen not to accept applicants from your region.
Be The First To Know

About the latest Seo sem Jobs in Saudi Arabia !

Digital Marketing Manager

Riyadh, Riyadh confidential

Posted 1 day ago

Job Viewed

Tap Again To Close

Job Description

تُمنح الأولوية للسعوديين لشغل هذه الوظيفة.

المسؤول عن تطوير وتنفيذ استراتيجيات التسويق الرقمي التي تعزز من وجود الشركة في السوق. يتطلب هذا الدور مزيجًا من الإبداع والتحليل، حيث يجب على المدير أن يكون قادرًا على استخدام البيانات لتوجيه القرارات التسويقية. سيكون مدير التسويق الرقمي مسؤولًا عن إدارة الحملات الإعلانية عبر الإنترنت، وتحسين محركات البحث، والتسويق عبر وسائل التواصل الاجتماعي، بالإضافة إلى تحليل الأداء لضمان تحقيق الأهداف المحددة.

المسؤوليات:

  1. تطوير استراتيجيات تسويق رقمي شاملة تتماشى مع أهداف الشركة.
  2. إدارة الحملات الإعلانية عبر الإنترنت وتحليل أدائها.
  3. تحسين محركات البحث (SEO) لزيادة الظهور في نتائج البحث.
  4. إدارة حسابات وسائل التواصل الاجتماعي والتفاعل مع الجمهور.
  5. تحليل بيانات الأداء واستخدامها لتوجيه استراتيجيات التسويق المستقبلية.
  6. التعاون مع الفرق الداخلية لتطوير محتوى تسويقي جذاب.
  7. تحديد الاتجاهات في السوق وتقديم توصيات لتحسين الأداء.
  8. إدارة ميزانية التسويق الرقمي وضمان الاستخدام الفعال للموارد.
  9. تقديم تقارير دورية عن أداء الحملات التسويقية.
  10. البقاء على اطلاع بأحدث الاتجاهات والتقنيات في التسويق الرقمي.

المرشح المثالي:

  1. خبرة لا تقل عن 5 سنوات في مجال التسويق الرقمي.
  2. مهارات تحليلية قوية وقدرة على استخدام أدوات التحليل.
  3. إبداع وابتكار في تطوير الحملات التسويقية.
  4. قدرة على العمل تحت الضغط وإدارة الوقت بفعالية.
  5. مهارات تواصل ممتازة باللغة العربية والإنجليزية.
  6. فهم عميق لأدوات التسويق الرقمي مثل Google Analytics وSEO.
  7. قدرة على العمل بشكل مستقل وكجزء من فريق.
  8. خبرة في إدارة ميزانيات التسويق.
  9. التكيف مع التغيرات السريعة في السوق.
  10. مهارات تنظيمية قوية وقدرة على إدارة المشاريع.

Skills

  • إدارة الحملات الإعلانية عبر الإنترنت.
  • تحسين محركات البحث (SEO).
  • تحليل البيانات واستخدام أدوات التحليل.
  • التسويق عبر وسائل التواصل الاجتماعي.
  • كتابة المحتوى التسويقي الجذاب.
  • إدارة الميزانية والتخطيط المالي.
  • التواصل الفعال مع الفرق المختلفة.
  • التكيف مع الاتجاهات الجديدة في التسويق الرقمي.

#J-18808-Ljbffr
This advertiser has chosen not to accept applicants from your region.

Digital Marketing Executive

Riyadh, Riyadh OR INT.

Posted 1 day ago

Job Viewed

Tap Again To Close

Job Description

The Senior Digital Marketing Executive is a key player in driving the company's online marketing strategy and enhancing its digital footprint. This role requires a seasoned professional with extensive experience in digital marketing who can lead initiatives that promote the company's products and services effectively. The Senior Digital Marketing Executive will be responsible for developing comprehensive marketing campaigns across various digital channels, including social media, email, and search engines. By utilizing advanced analytics and market research, the executive will optimize marketing efforts to maximize ROI and ensure alignment with the company's overall business objectives.

Responsibilities:

  1. Lead the development and execution of integrated digital marketing strategies to enhance brand visibility and drive customer engagement.
  2. Oversee the management of social media platforms, ensuring consistent messaging and timely responses to customer interactions.
  3. Conduct in-depth SEO audits and implement strategies to improve website rankings and organic traffic.
  4. Analyze and report on the performance of digital marketing campaigns, providing insights and recommendations for improvement.
  5. Collaborate with cross-functional teams to ensure marketing initiatives align with sales objectives and product launches.
  6. Manage and optimize email marketing campaigns, focusing on segmentation, personalization, and performance metrics.
  7. Stay abreast of industry trends, emerging technologies, and best practices to keep the company at the forefront of digital marketing.
  8. Mentor and guide junior marketing staff, fostering a culture of continuous learning and professional development.
  9. Develop and manage budgets for digital marketing initiatives, ensuring cost-effective strategies are implemented.
  10. Engage in brainstorming sessions to generate innovative marketing concepts and campaigns.

Preferred Candidate:

  1. Extensive experience in digital marketing, preferably in a senior or managerial role.
  2. Strong analytical skills with a proven track record of using data to drive marketing decisions.
  3. Exceptional communication and leadership skills, with the ability to inspire and motivate a team.
  4. Creative problem-solver with a passion for staying ahead of digital marketing trends.
  5. Ability to manage multiple projects and deadlines in a fast-paced environment.
  6. Proficiency in marketing automation tools and CRM systems.
  7. Strong project management skills with a focus on delivering results.
  8. Detail-oriented with a commitment to high-quality work.
  9. Experience with graphic design software is an advantage.
  10. Willingness to adapt and learn in a rapidly changing digital landscape.

Skills

  • Expertise in digital marketing tools and platforms (e.g., Google Analytics, HubSpot).
  • In-depth knowledge of SEO, PPC, and social media marketing strategies.
  • Strong writing and editing skills for creating impactful content.
  • Ability to analyze complex data sets and derive actionable insights.
  • Familiarity with HTML and web design fundamentals.
  • Excellent organizational skills and attention to detail.
  • Experience with email marketing solutions (e.g., Mailchimp, SendGrid).
  • Proficiency in graphic design tools (e.g., Adobe Creative Suite) is a plus.
#J-18808-Ljbffr
This advertiser has chosen not to accept applicants from your region.

Senior Digital Marketing

Jeddah, Makkah Rama Medical Group

Posted 2 days ago

Job Viewed

Tap Again To Close

Job Description

We're looking to hire:

Senior Digital Marketing

+2 years of experience in the same position

Scope

Audience Targeting & Research: Conduct detailed market research to define buyer personas.

Job roles:
  • Use tools like LinkedIn Sales Navigator, SEMrush, or Clearbit for B2B targeting
  • Lead Generation Strategy Development: Design a lead generation funnel (TOFU, MOFU, BOFU)
  • Develop multi-channel strategies (LinkedIn, Google Ads, SEO, email, etc.)
  • Technical Setup & Tool Integration: Ensure proper lead management. Manage CRM and automation platform integrations (e.g., HubSpot, Salesforce, Zoho)
  • Use and suggest tools like Unbounce, Instapage, Typeform, or native CRM forms to support targeting and lead generation activities
  • Support technical aspects of Campaign Execution (Paid & Organic): Launch and manage paid media campaigns (PPC, social media ads) and organic content efforts (SEO blogs, LinkedIn posts)
#J-18808-Ljbffr
This advertiser has chosen not to accept applicants from your region.
 

Nearby Locations

Other Jobs Near Me

Industry

  1. request_quote Accounting
  2. work Administrative
  3. eco Agriculture Forestry
  4. smart_toy AI & Emerging Technologies
  5. school Apprenticeships & Trainee
  6. apartment Architecture
  7. palette Arts & Entertainment
  8. directions_car Automotive
  9. flight_takeoff Aviation
  10. account_balance Banking & Finance
  11. local_florist Beauty & Wellness
  12. restaurant Catering
  13. volunteer_activism Charity & Voluntary
  14. science Chemical Engineering
  15. child_friendly Childcare
  16. foundation Civil Engineering
  17. clean_hands Cleaning & Sanitation
  18. diversity_3 Community & Social Care
  19. construction Construction
  20. brush Creative & Digital
  21. currency_bitcoin Crypto & Blockchain
  22. support_agent Customer Service & Helpdesk
  23. medical_services Dental
  24. medical_services Driving & Transport
  25. medical_services E Commerce & Social Media
  26. school Education & Teaching
  27. electrical_services Electrical Engineering
  28. bolt Energy
  29. local_mall Fmcg
  30. gavel Government & Non Profit
  31. emoji_events Graduate
  32. health_and_safety Healthcare
  33. beach_access Hospitality & Tourism
  34. groups Human Resources
  35. precision_manufacturing Industrial Engineering
  36. security Information Security
  37. handyman Installation & Maintenance
  38. policy Insurance
  39. code IT & Software
  40. gavel Legal
  41. sports_soccer Leisure & Sports
  42. inventory_2 Logistics & Warehousing
  43. supervisor_account Management
  44. supervisor_account Management Consultancy
  45. supervisor_account Manufacturing & Production
  46. campaign Marketing
  47. build Mechanical Engineering
  48. perm_media Media & PR
  49. local_hospital Medical
  50. local_hospital Military & Public Safety
  51. local_hospital Mining
  52. medical_services Nursing
  53. local_gas_station Oil & Gas
  54. biotech Pharmaceutical
  55. checklist_rtl Project Management
  56. shopping_bag Purchasing
  57. home_work Real Estate
  58. person_search Recruitment Consultancy
  59. store Retail
  60. point_of_sale Sales
  61. science Scientific Research & Development
  62. wifi Telecoms
  63. psychology Therapy
  64. pets Veterinary
View All Seo Sem Jobs