Find sitemap.xml, robots.txt, ads.txt, app-ads.txt and sellers.json - Real-Time Search
The robots.txt file is a file at the root a domain indicates parts of the site should not be accessed by search engine crawlers.
User-agent: Google
Craw-delay: 0
User-agent: Yahoo
Crawl-delay: 0
User-agent: Bing
Craw-delay: 0
User-agent: *
Crawl-delay: 10