Robot.txt Is a File Which Tells the Search Engine Crawler To Which Pages or Files Crawlers Can or Cannot Request from Your Site.search Engines Like Google,bing, and Other Read This File to Crawl Your Site More Accurately. a Robot.txt Tells Google/bing/etc Which Pages and Files Are Important in Your Site, and Also Provides Valuable Information About These Files: for Example, for Pages, the Page Was Last Updated When the Page Was Last Updated. How Many Times Have Been Changed, and Any Alternate Language Etc.