Well, I am a SEO newer. Our company constantly need to buy links from other sites. However, we found that there are some sites' pr have been changed in Jan. I want to know how often for google to update the pr and how they work?
Usually Google updates PR 3-4 months time since they have updated last December 31 I think another PR update would come March- April but it really depends on Google they might update the PR before or after that time frame.
Some people think that for ranking purposes Google is constantly re-evaluating the PR of the pages it has indexed. The idea is that it does this for its own purposes in order to provide accurate rankings. The more official, public PR update get done about once every 3 months. This is when the info that the browser plugins can display, gets updated.
Usually Google updates PR on quarterly basis. This is visible on the Google toolbar. The last PR update went through on the New Years Eve.
Hi, I agree with you that Usually Google updates PR on quarterly basis. Although the basic principle of operation of all search engines is the same, the minor differences between their relevancy algorithm lead to major changes in results relevancy. Thanks Auctionwebsitescript