Log file analysis
Log file analysis is the study of server access logs to see how search engine crawlers actually navigate a site — which pages, how often, and with which status codes.
Where Search Console samples and aggregates, log file analysis shows raw truth: exactly which URLs Googlebot, Bingbot, GPTBot and others fetched, how often, and what the server returned. For large sites (>50,000 URLs) essential for crawl budget optimisation and monitoring AI crawlers.
Example
Log analysis reveals Googlebot spends 40% of its crawl budget on a forgotten facet filter with thousands of URL variants. Blocking via robots.txt returns crawl attention to product pages.
Frequently asked questions
Which tool for log analysis?
Screaming Frog Log File Analyser (desktop, affordable), Botify or OnCrawl (enterprise), or DIY with ELK stack / BigQuery for extreme scale.
Can I spot AI crawlers?
Yes, via user-agent: GPTBot, ClaudeBot, PerplexityBot, Google-Extended, Bytespider. Check whether you allow them; log analysis shows if GEO opportunity is captured.
Related terms
Further reading
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