seobyindia

Robots.txt is a text (not html) file you put on your site to tell search robots which pages you would like them not to visit. Robots.txt is by no means mandatory for search engines but generally search engines obey what they are asked not to do. It is important to clarify that robots.txt is not a way from preventing search engines from crawling your site (i.e. it is not a firewall, or a kind of password protection) and the fact that you put a robots.txt file is something like putting a note “Please, do not enter” on an unlocked door.

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SEO India ....

SEOPunk

Hi.
Robots.txt helps search engine to find that which site to visit or which site not to visit.

royking

Basically robots.txt is helpful to search engine to find a website. It means it is a invitation to search engine to come and crawl. Robots.txt is also helpful if you don't want to crawl any page.

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IAMalfin

The Robot Exclusion Standard, also known as the Robots Exclusion Protocol or robots.txt protocol, is a convention to prevent cooperating web crawlers and other web robots from accessing all or part of a website which is otherwise publicly viewable.

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ryangetty

Robot.txt files are simple text files it tells the search engine which file to be visit or which not.

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titleseo

When you first time create your ftp account for uploading your file on server, you can't the Robot.txt file in the ftp. You have to create this file and need to update in your ftp details or server. The Robot.txt file use for telling google or other search engine, which website page you want to index on search engine and which one you want to hide from crawler so they will automatically get de-index. Some time the important page like cpanel, login page of admin available in the ftp file and if the secure data get index on search engine then it will get stolen by spammer.

That's the reason why people use Robot.txt file for re-strutting crawler.