Glossary · Crawlers and access
blocked render resource
A stylesheet or script the homepage references that the site's own robots.txt disallows to every crawler. A rendering crawler obeys the rule and draws the page without it, so layout and any script-inserted content are judged from a page the site never intended to show. Reported as RENDER_RESOURCE_BLOCKED from the * group only.
Terms this definition uses
Crawlers and access
Who is fetching, whether they are who they claim, and what your rules actually permit.
retrieval crawler · user-triggered fetch · verified crawler · forged crawler identity · unverifiable · robots.txt · user-agent group · AI opt-out · Content-Signal · crawl budget · cloaking · challenge page at 200 · uniform refusal · nonexistent-path control · off-host redirect · homepage refused · FCrDNS · Crawler trap · Conditional request · ASN blocking · operator feed · residential proxy · Google-Extended · Google-Agent · GPTBot vs OAI-SearchBot · ClaudeBot vs Claude-User · PerplexityBot vs Perplexity-User · CCBot · Bytespider · agentic traffic · crawler classification
← nonexistent-path control · off-host redirect →
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