Are you looking for what to do if you notice a drastic drop in your blog’s rankings and traffic from Google? Below are steps you can take to diagnose the problem and this recover from the slump. Much of it is taken from this webmaster help video by Matt Cutts.
1. Do a site searchEnter “site: mydomain.com” in Google search box to list up all your indexed pages. Things to look for in the search listing:Does your blog disappear completely in Google search results or just a part of it disappears?
Check if there is partial indexing i.e. title with no snippet. If you don’t see a snippet, that may be caused by robots.txt blocking crawlers.
Check if there is any "This site may harm your computer" malware warning message appearing below your...