Key Takeaways
- Crawlability and indexation form the foundation of every technical SEO audit
- Core Web Vitals (LCP under 2.5s, FID under 100ms, CLS under 0.1) directly impact rankings
- Mobile-first indexing means Google predominantly uses the mobile version of your content
- Structured data markup earns rich snippets and improves click-through rates
- Page speed improvements deliver both ranking benefits and higher conversion rates
Crawlability and Indexation Analysis
The first phase of any technical SEO audit examines whether search engines can discover and index your pages. Without proper crawlability, all other optimization efforts are wasted.
| Audit Area | Tool | What to Check |
|---|---|---|
| Robots.txt | Google Search Console | Unintentional blocks, wildcard rules, crawl directives |
| XML Sitemap | Screaming Frog | Completeness, valid URLs, lastmod accuracy |
| Index Coverage | Google Search Console | Indexed vs excluded pages, error types |
| Crawl Budget | Log File Analyzer | Bot crawl frequency, wasted crawls on low-value pages |
| Canonical Tags | Screaming Frog | Self-referencing canonicals, cross-domain canonicals |
A single misconfigured robots.txt rule can deindex your entire site. Always test changes in Google Search Console's robots.txt tester before deploying.
Core Web Vitals Assessment
Google uses three Core Web Vitals metrics as ranking signals. Each measures a different aspect of user experience and requires different optimization strategies.
| Metric | Good Threshold | Common Fixes |
|---|---|---|
| LCP (Largest Contentful Paint) | Under 2.5 seconds | Image optimization, CDN, server response time |
| FID / INP (Interactivity) | Under 100ms / 200ms | Reduce JavaScript, defer non-critical scripts |
| CLS (Cumulative Layout Shift) | Under 0.1 | Set image dimensions, reserve ad space, font loading |
Focus on field data from Chrome UX Report rather than lab data from Lighthouse. Field data reflects actual user experience across diverse devices and connections.
Site Architecture and Internal Linking
Site architecture determines how link equity flows through your site and how easily search engines discover content. A flat architecture ensures important pages are within three clicks of the homepage.
- Map your current site structure and identify pages more than 3 clicks deep
- Audit for orphan pages with no internal links pointing to them
- Fix broken internal links that waste crawl budget
- Add contextual links between topically related content
- Implement breadcrumb navigation for clear hierarchy signals
- Use descriptive anchor text that includes target keywords naturally
- Prioritize linking to high-value commercial pages from informational content
- Create hub pages that link to all related content within a topic cluster
- Regularly audit internal links as content is added and removed
Structured Data and Schema Markup
Structured data helps search engines understand your content and can earn rich results including star ratings, FAQ dropdowns, and breadcrumb trails in search results.
| Schema Type | Page Type | Rich Result |
|---|---|---|
| Organization | Homepage | Knowledge panel, logo in results |
| Product | Product pages | Price, availability, reviews |
| FAQ | FAQ/informational | Expandable FAQ in SERPs |
| Article | Blog posts | Author, date, thumbnail |
| BreadcrumbList | All pages | Breadcrumb trail in results |
Validate all structured data with Google's Rich Results Test before deploying. Invalid markup is ignored and does not earn rich results.
Mobile Optimization and HTTPS Security
With mobile-first indexing, Google predominantly uses the mobile version of your site for ranking. HTTPS is a confirmed ranking signal and essential for user trust.
- Verify mobile and desktop content parity using Google's Mobile-Friendly Test
- Check for mixed content warnings where HTTP resources load on HTTPS pages
- Ensure all HTTP URLs redirect properly to their HTTPS equivalents
- Test mobile page speed separately as mobile connections are typically slower
- Verify touch targets are properly sized (minimum 44x44 pixels) for mobile users
Run your technical SEO audit quarterly and after any major site changes. Technical issues compound over time, so regular audits prevent small problems from becoming ranking disasters.
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