google updation

Hi,
when and why google update again and again ?

Google updation will keep informed about the latest Google services that helps you to follow the organic website ranking process.

Google update penguin algorithm on 24 april 2012, in this update google penalized scamers.

no doublicate contain post?

Google says many a times that it's looking to give best user experience by promoting best & quality sites over spammy sites. And all these updates are related to their claim.

no doublicate contain post?

no duplicate contain post.