A month ago, I opened 3 new sites. It seems to be ok, after one month, over 15000 pages were indexed. However today 70% of those pages were gone from google. I link to those 3 sites from my other sites. Is this a sign of sandbox or something? What I can think of one change I made yesterday is that I combine all adsense accounts of my sites into one, I used to use different adsense account for different site which is not very nice. The result is that not only my new site get dropped, my old site is cut off a lot of pages as well. Some one has any advice?
I highly doubt the adsense made any different, but it's good you made the change, as you are not allowed to have more then one adsense account without approval from google
That was what I thought before. However, according to the new release google patent document. Google simple use everything they have to determine the ranking, etc... Adword, Adsense, toolbar, domain record. Google is using everything.
yeah but you didn't change the content on the pages, just the account they came from. sounds more like a classic sandbox issue to me. There are a million stories of that happeneing - indexed quickly, then poof, gone for a few months. the general advice is to keep building quality backlinks, add good content and wait it out.
I am willing to be this is a database driven site with loads of duplicate content and that is the reason all those pages were dropped. Wendys advice should probably change to "change to good content"
I would like to point out a few things. I have never seen the sandbox be responsible for deindexing of pages. It has ALWAYS had to do more with rankings. As far as the sandbox is concerned, it has also been my experience that it is closely tied to the date SEO work was started in earnest more so than the date the actual domain was registered.