Pages disappeared/removed from Google index

Pages disappeared/removed from Google index
Your pages are disappeared/removed from Google Index. Are you looking for the reasons for disappearance of your pages from google index? Here I will discuss about the possible reasons for disappearance of pages from google Index.
Disappearance of pages from google index is not only your problem, it is the problem of many websites having a large number of pages. Go for a test for your site whether it is indexed or not. First search for http://www.google.com/ then insert your website address into the search box. Press search. If you get result then your site is in google indexed.
Some of your pages may be disappeared all of a sudden. But the pages may be recovered slowly within few days. It the pages of your site are disappeared/removed from google index for several weeks. Then you should investigate whether your site has maintained quality guidelines set out by Google. I do confess that my site was also disappeared from google index. But After 9/10 days again my pages have been recovered. Some of the possible reasons for disappearance of pages from google index are as under:
1. Your contents are not up to the mark
2. Your site are not connected with other quality sites
3. Your have multiple pages in the same thing
4. Your pages are identical with other pages
The design of the site is not supporting google to effectively crawl its content.
6. your site is connected with bad neightbour such as massive link farms.
7. Your site have hidden links or spam.
8. You have employed cloaking or sneaky redirects
You may follow Matt Cutts in this regard in the recent blogpost.