# SEO Optimization > SEO best practices including meta tags, structured data (Schema.org), semantic HTML, performance optimization, and multilingual SEO with hreflang Use when this capability is needed. - Skill: `tomevault-io/seo-optimization` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add tomevault-io/seo-optimization` - Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/seo-optimization/raw - Safety review: pending (external: skill-scanner PASS, skillspector PASS) - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Marketing & Growth - Author: tomevault-io (https://skillmd.com/u/tomevault-io) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/tomevault-io/seo-optimization --- # SEO Optimization Skill ## Purpose Ensures websites are optimized for search engines following modern SEO best practices, with focus on technical SEO, structured data, and international/multilingual support. ## Rules ### Meta Tags (MUST HAVE) ```html Cybersecurity Consulting Services | Hack23 AB ``` ### Structured Data (Schema.org) **MUST USE for:** - Organization - WebSite - BreadcrumbList - Article (blog posts) - FAQPage - Service **Example - Organization:** ```html ``` ### Multilingual SEO (hreflang) **MUST IMPLEMENT for translated pages:** ```html ``` ### Semantic HTML for SEO **MUST:** - Use `

` once per page - Maintain proper heading hierarchy (h1→h2→h3) - Use semantic elements (`
`, `
`, `
`, `
`) - Include `alt` text on all images - Use descriptive anchor text ### Performance Optimization MUST: - Achieve Lighthouse Performance score ≥ 90 - First Contentful Paint < 1.5s - Largest Contentful Paint < 2.5s - Time to Interactive < 3.5s - Use WebP images with fallbacks - Minify HTML/CSS/JavaScript - Enable gzip/Brotli compression - Implement lazy loading for images ### Sitemap & Robots.txt sitemap.xml: ```xml https://www.hack23.com/services.html 2025-01-24 monthly 0.8 ``` robots.txt: ``` User-agent: * Allow: / Sitemap: https://www.hack23.com/sitemap.xml ``` ### Security Headers (SEO Impact) MUST INCLUDE: ``` Strict-Transport-Security: max-age=31536000; includeSubDomains; preload X-Content-Type-Options: nosniff X-Frame-Options: SAMEORIGIN Referrer-Policy: strict-origin-when-cross-origin ``` ## SEO Checklist - [ ] Unique `` per page (50-60 chars) - [ ] Unique meta description per page (150-160 chars) - [ ] Canonical URL specified - [ ] Structured data (Schema.org) implemented - [ ] hreflang tags for translations - [ ] Sitemap.xml generated and submitted - [ ] robots.txt configured - [ ] Mobile-friendly (responsive design) - [ ] HTTPS enforced - [ ] Page load time < 3 seconds - [ ] Images optimized (WebP) - [ ] Alt text on all images - [ ] Internal linking structure - [ ] Breadcrumb navigation - [ ] 404 page exists - [ ] No broken links ## Related Documentation - [html-css-best-practices SKILL.md](../html-css-best-practices/SKILL.md) - [accessibility-wcag SKILL.md](../accessibility-wcag/SKILL.md) ## Tools - Google Search Console: Monitor search performance - Schema.org Validator: https://validator.schema.org/ - Rich Results Test: https://search.google.com/test/rich-results - Lighthouse: Performance and SEO audits --- > Converted and distributed by [TomeVault](https://tomevault.io/claim/hack23) — claim your Tome and manage your conversions.