Hello Frinds: Please tell me, is it necessary to put a robots.text file, if yes then what is the simple format? Thanks
Yes Its Necessary Because what is the use of google crawler to visit your signup page of your site. You can block signup page or other necessay pages that you dont want to get crawle by search engine. Correct Format of : (User-agent:* Disallow
No, you don't need it, unless you want to block something specifically. A very good website about how to use robots.txt correctly: http://www.robotstxt.org
Dude you always need a robots.txt to stop crawlers from accessing specific pages of your website/blog like login page etc. because these pages create a negative impact on search engines and can lower your rankings.