Server log files record requests that reached a website’s server. SEO log analysis can show which URLs verified search crawlers requested, what responses they received, and whether important sections are being discovered.
Collect and prepare useful logs
Identify the relevant server, CDN, and time window. Ensure logs include timestamp, requested path, response status, user agent, and enough request context to understand redirects or errors.
Protect personal data and follow retention policy. Remove or aggregate fields that are not needed for crawl analysis before sharing extracts.
Verify crawler identity
A user-agent string can be spoofed. Use the platform’s recommended verification method or a trusted log-processing service before labeling requests as a particular search crawler.
Separate confirmed crawlers from unknown bots and human requests. A large raw request count can otherwise exaggerate search-engine activity.
Analyze access and response patterns
Group requests by template, status code, parameter type, and update period. Look for repeated requests to low-value URLs, missed high-priority pages, redirect chains, or server errors.
Compare crawler requests with the site’s internal links, sitemap, and indexation reports. Logs show requests received, not whether a page was indexed or ranked.
Turn patterns into technical actions
Fix broken links, response codes, parameter sprawl, or crawl traps only after confirming the pattern and user impact. Re-run analysis after deployment to see whether the change altered behavior.
Our guide to diagnosing indexing exclusions complements server-side evidence.
Related reading: indexing exclusions.
Practical checklist
- Check the rendered page and technical signals rather than relying on one report.
- State the purpose and limits of each URL, directive, or measure.
- Re-crawl or review performance after changes and document the result.
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