You are in case your website disappeared from Google’s Results? Matt Cutts has posted two quick tips on Twitter to help webmasters overcome this situation.
Here are two tips:
Tip #1: Your website can be listed is webspam
If you don’t see your site in Google’s results, check http://google.com/webmasters/ for any manual webspam actions.
Tip #2: Your web server might be blocking Googlebot
If [Tip #1 ] doesn’t resolve it, try Fetch as Google feature: https://support.google.com/webmasters/answer/158587. Your web server might be blocking Googlebot.