Google page rank... meanings?
 

Does anyone know or know of a good site that explains the whole Google page rank structure, and what it means to be PR3, PR4, PR5, etc...?

I have noticed this morning a couple of my sites that were PR3 are now PR4 and I'm wondering what I should do about it (if anything at all).

If they went from PR3 to PR4, keep doing what your doing.

http://www.iprcom.com/papers/pagerank/

I would capitolize on that Chris, that is a great sign meaning the quality of your traffic has increased so that can only be a positive thing!!

Nice link Stephane76.

You might want to search google for "squirrel rank"... it explains it all.

helpful link mate.. thanks

http://www.seroundtable.com/

sounds good