The robots.txt file controls how search engine spiders see and interact with your webpages.The first thing a search engine spider like Google bot looks at when it is visiting a page is the robots.txt file.It does this because it wants to know if it has permission to access that page or file. If the robots.txt file says it can enter, the search engine spider then continues on to the page files.
Robots.txt helps to prevent some pages to index on google. Those pages which you can't want to index on search engine then make it disallow. Then search crawler can't read or index that URL.
Robot.txt is text file and if you want to crawl content so you can use allow and if you do not want you so you can use this disallow. This is the Robots.txt helps to prevent some pages to index on google.
A robots.txt file gives instructions to web robots about the pages the website owner doesn’t wish to be ‘crawled’. For instance, if you didn’t want your images to be listed by Google and other search engines, you’d block them using your robots.txt file. It helps to avoid hacking problems to a website for payment gateway sites.
Robots.txt is a text file that is used on your website in order to tell the search robots about the pages that you do not like them to visit. It is not at all a way to prevent the search engines to crawl your websites. But the main reason that it is used is because to keep the sensitive information private.
Robots.txt is a content (not html) document you put on your site to tell seek robots which pages you might want them not to visit. Robots.txt is in no way, shape or form required for web indexes however by and large internet searchers obey what they are requested that not do.
A robots.txt file is placed at the root of your domain to tell search engines and other web robots or spiders how to interact with your site. The robots.txt file allows you to specify which sections or pages of your site you want search engines to access, and which sections you want to restrict access to.