The Technical SEO Audit Playbook

What a Technical SEO Audit Actually Is

A technical SEO audit is a systematic review of everything that prevents search engines from efficiently crawling, indexing, and rendering your pages. It's not about content or backlinks — it's about infrastructure.

Phase 1: Crawlability

robots.txt

Start here. A misconfigured robots.txt can block entire sections of your site from Google.

• Ensure no Disallow rules block important pages
• Reference your XML sitemap
• Test with Google's robots.txt tester

XML Sitemap

Your sitemap should:

• Include only canonical, indexable URLs
• Be under 50,000 URLs (split into multiple if needed)
• Be submitted in Google Search Console
• Auto-update when content changes

Site Architecture

Aim for a flat architecture where every page is reachable within 3-4 clicks from the homepage. Use a logical URL structure:

/guides/seo/technical-seo-audit /guides/finance/cash-flow-management

Phase 2: Indexability

Canonical Tags

Every page should have a self-referencing canonical tag. This prevents duplicate content issues from:

• URL parameters (?utm_source=...)
• HTTP/HTTPS variants
• WWW/non-WWW variants
• Trailing slashes

Meta Robots

Check for accidental noindex tags on pages you want indexed. Common culprits:

• Staging environments promoted to production
• WordPress "Discourage search engines" left enabled
• Paginated pages with noindex (should use rel=prev/next instead)

HTTP Status Codes

• 200 — Good, page loads
• 301 — Permanent redirect (fine, passes link equity)
• 302 — Temporary redirect (doesn't pass full equity)
• 404 — Page not found (fix broken links)
• 5xx — Server error (critical, fix immediately)

Phase 3: Performance

Core Web Vitals

Google measures three metrics:

1. LCP (Largest Contentful Paint) — Under 2.5s
2. INP (Interaction to Next Paint) — Under 200ms
3. CLS (Cumulative Layout Shift) — Under 0.1

Core Web Vitals are a ranking factor. Not the most important one, but they're a tiebreaker — and they directly impact user experience.

Quick Wins

• Enable Brotli compression
• Lazy-load images below the fold
• Preconnect to third-party domains
• Defer non-critical JavaScript
• Use srcset for responsive images

Phase 4: Mobile

Google uses mobile-first indexing. Your mobile experience is your SEO experience.

• Test with Chrome DevTools device emulation
• Check tap targets (minimum 48x48px)
• Ensure viewport meta tag is set
• Verify font sizes (minimum 16px body)

Tools We Recommend

Deliverable Template

A good audit report includes:

1. Executive summary with critical/high/medium/low priorities
2. Issue-by-issue breakdown with screenshots
3. Recommended fixes with effort estimates
4. A 30/60/90-day implementation roadmap

Run this audit quarterly. Technical SEO is not a one-and-done task — your site evolves, Google's algorithms evolve, and issues creep in over time.