Unverified50% confidenceFactExact time
Googlebot 通过遵循各网站 robots.txt 协议决定可抓取的页面范围，robots.txt 是存放于网站根目录、用于向爬虫声明可抓取或屏蔽页面的文本文件
1
Sources
50%
Confidence
Long-term
Relevance
7/11/2026
First Seen
Sources
Related Claims
Partially Verifiedrobots.txt is a plain text file placed in a website's root directory that tells web crawlers which pages can be crawled and which should be avoided84% similarUnverifiedGooglebot 会遵循 HTTP 响应头中的 Cache-Control 和 Last-Modified 字段，对未变更页面实施增量抓取策略77% similarUnverifiedGoogle 的 Googlebot 每天抓取数百亿个 URL，依托分布式抓取调度系统、优先级队列、去重机制和DNS解析缓存集群73% similarVerifiedrobots.txt是1994年由网络机器人排除标准（REP）确立的行业惯例协议，并非强制性法律规定，但谷歌、百度等主流搜索引擎均严格遵守73% similarVerifiedrobots.txt协议由网络先驱Martijn Koster于1994年提出，是一个放置于网站根目录的纯文本文件67% similar
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