Check out matt cutts says how Google changes in ranking .according to them they are not thinking particularly on brands. Check out: youtube.com/watch?v=LMfWPWUh5uU
My internet is very slow right now , otherwise i would have checked it at this instant. Anyways thanks for sharing. will check it out after some time.
I don't they change often . Probably a week or even more than that is required for change in rankings.
This is the best video with regard to SEO. this really help me to study the recent SEO trends... Thanks for sharing!!!
The video is really interesting. Gives some food for thought as regards where we are headed if we are to survive the search engine wars