Webmaster central blog is another site that you can find out the latest and useful web information about Google. => http://googlewebmastercentral.blogspot.com/
Check out the labels on the right hand side of the site and see which one interest you the most. Although the site only update few times a month, all the posted are very informative. The last two sections on the list – webmaster guidelines and webmaster tools, whether you are a webmaster or you are the one who making update for your sites, we highly recommend you spend some time to read these sections, they are really useful and can definitely improve your site’s performance in some point.