Hi All, I had 21 Google back link in last Aug 2011. But today morning I saw only 11 google back links. 10 google link lost in 3 months. Will any one say why so?
Might depend on the type of BL"s you built. BL's come and go if you are building volatile links (blog comments, forum signatures/profiles.) For example, if you had a blog comment on a blog, the webmaster at any time can delete all comments if the blog post is over spammed. At that point, you just lost a back link. Build contextual links, within the body of a piece of content and you might get better results.
There are many possible reasons for this, for example if you were commenting on blogs and then the owners of those never bothered renewing their hosting or domain then their site goes down. When a site goes down so do the backlinks you built on it.
It's very likely the pages that hosted those backlinks have been taken down, either by the owner or the hosting company. It's also possible that the sites hosting your links cycle their links for fresh ones. If you haven't been posting new content regularly, the other site owners might think your site has stagnated and is no longer a valuable resource. You can probably recover some of those links by putting up new content.
one thing i want to add to the above point is.., backlinks are not long-established., don't ever think that your backlinks stay for a period of a life time.., because they can be removed by site owner or a hosting provider or site may expire.., build backlinks on a frequent interval of time..,
some of the backlinks do disappear over time. thats why its important to keep building links so that you dont lose the ranking when your backlinks drop. backlinks can disappear for various reasons. maybe the page where yuor link was at one point dont have the link there anymore. or could be the linking page moved to archive where google can't directly access the page anymore. or could be the entire site where your link was at one point dont exist. hard to say why but some of the links do drop over time.
You have no idea how many links Google knows about or counts for your site. The LINK: operator typically only shows a small sample of your back links. Webmaster Tools also shows only a sample of the back links Google knows about... usually a larger sample than LINK: but still a sample. And they both show URLs known not to count like NOFOLLOW links and links from URLs known to be under penalty. Also, the how you build links can cause them to drop over time. Blog commenting, forum posting, article submission, etc. as a means of link building all suffer from this phenomenon. As the blog post/thread/articles age, they no longer appear on the blog home page/forums 1st page/recent articles page. They fall deeper and deeper into the archives over time. They often get deindexed at some point if they did not receive external links at some point.