Log File Analysis.
Learn what Log File Analysis means in modern search and SEO.
Examining server log files to understand exactly how search engine crawlers are accessing and behaving on a website.
Log file analysis examines the raw server logs that record every request made to a website—including every Googlebot crawl. Unlike crawl simulations or GSC data, server logs capture actual bot behaviour: which pages were requested, how often, what response codes were returned, and how crawl frequency varies by page type. This provides ground truth about how Google is actually experiencing a site.
What Log Files Reveal
Log analysis reveals: which pages Googlebot crawls most frequently (correlated with perceived importance); which pages are rarely or never crawled (potential crawl budget issues or internal linking gaps); crawl spikes after content publication (useful for understanding crawl prioritisation); server errors that may not appear in GSC; bot traffic from legitimate crawlers vs. malicious scrapers; and the actual crawl rate vs. GSC-reported crawl rate.
Log Analysis Tools
Tools for log file analysis include Screaming Frog Log File Analyser, Botify, DeepCrawl, and custom solutions using Python with pandas. Log files are typically in W3C or Common Log Format and can be very large—gigabytes for high-traffic sites. Analysis focuses on filtering for Googlebot user-agent and correlating crawl frequency with organic ranking data to identify the relationship between crawl patterns and search performance.
Articles about Log File Analysis
Read more on the Aergos blog.
10 SEO Tasks an AI Agent Cannot Actually Do (Yet)
AI agents can draft content, brainstorm keywords, and explain technical concepts. But there are real gaps between what an LLM thinks it knows and what your site actually needs. Here are 10 SEO tasks where AI still falls short — and what to use instead.
Read article
Should You Trust ChatGPT to Audit Your Website? An Honest Answer
ChatGPT can do a lot of things. Auditing your website's technical health is not really one of them. Here's where it genuinely helps, where it will get you in trouble, and which tools to use instead.
Read articleReady to close the loop?
See every term in action
Aergos tracks your AI and organic visibility across every channel, in one platform.
Not ready to talk? Audit your site free →