How robot.txt file is important to index my domain in the Google. How create robot.txt file to index well my domain in Google
robots.txt file is very imp if u have certain directories which u don't wnt spiders to crawl.. read here http://www.webmasterworld.com/robots_txt/3203372.htm
You've posted in the wrong forum - this should be in the robots.txt forum, not the Google forum, but I'm sure that'll soon be taken care of. As seo_kate says, you use robots.txt to keep spiders out of parts of your site you don't want indexed. You can't use robots.txt to make Google or any other spider index your site any better. The quality and quantity of indexing is determined mainly by who links to you.
robots.txt does not help you in indexing your site.. it only prevents you to index those directories or pages which you don't want to be indexed