Whether back links or Page Ranks are also being updated all at the same time? In general, Search engine wouldn’t fixate too much on back links or Page Rank during an update. The external back links/PR that we show has at least a couple factors that complicate analysis. First off, they are a snapshot in time, and the actual backlinks/PageRank used for ranking are from a different time interval. Another complicating factor is that we don’t show every backlink on Google; we only show a subset of the backlinks we have internally.