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)
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<!-- Title: 50-60 characters -->
<title>Cybersecurity Consulting Services | Hack23 AB</title>
<!-- Meta Description: 150-160 characters -->
<meta name="description" content="Expert cybersecurity consulting with transparent security practices. ISO 27001, GDPR, and NIS2 compliance support for Swedish organizations.">
<!-- Canonical URL -->
<link rel="canonical" href="https://www.hack23.com/services.html">
<!-- Open Graph (Social Media) -->
<meta property="og:title" content="Cybersecurity Consulting Services">
<meta property="og:description" content="Expert security consulting with transparency">
<meta property="og:image" content="https://www.hack23.com/images/og-image.jpg">
<meta property="og:url" content="https://www.hack23.com/services.html">
<meta property="og:type" content="website">
<!-- Twitter Card -->
<meta name="twitter:card" content="summary_large_image">
<meta name="twitter:title" content="Cybersecurity Consulting Services">
<meta name="twitter:description" content="Expert security consulting">
<meta name="twitter:image" content="https://www.hack23.com/images/twitter-card.jpg">
</head>Structured Data (Schema.org)
MUST USE for:
- Organization
- WebSite
- BreadcrumbList
- Article (blog posts)
- FAQPage
- Service
Example - Organization:
<script type="application/ld+json">
{
"@context": "https://schema.org",
"@type": "Organization",
"name": "Hack23 AB",
"url": "https://www.hack23.com",
"logo": "https://www.hack23.com/images/logo.png",
"description": "Cybersecurity consulting with transparent security practices",
"address": {
"@type": "PostalAddress",
"addressCountry": "SE"
},
"sameAs": [
"https://github.com/Hack23",
"https://www.linkedin.com/company/hack23"
]
}
</script>Multilingual SEO (hreflang)
MUST IMPLEMENT for translated pages:
<link rel="alternate" hreflang="en" href="https://www.hack23.com/services.html">
<link rel="alternate" hreflang="sv" href="https://www.hack23.com/services_sv.html">
<link rel="alternate" hreflang="de" href="https://www.hack23.com/services_de.html">
<link rel="alternate" hreflang="x-default" href="https://www.hack23.com/services.html">Semantic HTML for SEO
MUST:
- Use
<h1>once per page - Maintain proper heading hierarchy (h1→h2→h3)
- Use semantic elements (
<article>,<nav>,<header>,<footer>) - Include
alttext 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 version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"
xmlns:xhtml="http://www.w3.org/1999/xhtml">
<url>
<loc>https://www.hack23.com/services.html</loc>
<lastmod>2025-01-24</lastmod>
<changefreq>monthly</changefreq>
<priority>0.8</priority>
<xhtml:link rel="alternate" hreflang="sv" href="https://www.hack23.com/services_sv.html"/>
<xhtml:link rel="alternate" hreflang="de" href="https://www.hack23.com/services_de.html"/>
</url>
</urlset>robots.txt:
User-agent: *
Allow: /
Sitemap: https://www.hack23.com/sitemap.xmlSecurity 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-originSEO Checklist
- Unique
<title>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
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