Few days back my site lost ranking from google approx all dynamic pages pages except home and static pages. After couple of days it came back and after two days again it got completley of google ranking. Now few days back it came again and again it has gone out of ranking. What is happining. can any body tell me.
i think G did not get mad . G has update pr or change pr algorithm . your position change is related with this
May be they found a bug in their PR algorithm - and you saw the transition period when different bug fixes were implemented...
Always check your back links at mutiple DC's it would be of great help to you you can check here at http://link.ezer.com Also check at these DC's 216.53.XX.XX These Dc's seem to hold indexed pages
Take a look around - there is plenty of threads with same questions. Be patient - wait for the end of update.
Yes, Google data refresh is the main cause for this issue.. We can do nothing other than building / attracting more quality links