Google Webmasters is a resource of Google professional developers full of ideas and information how to optimise your SEO and site to deliver best value from Google. The main resource page can be found here.
To support their site, GWM also hosts a YouTube channel which provides excellent materials. Through short (and some longer) videos that are casual and range from beginner to more advanced, almost all aspects of getting the most out of Google (and thus your site and/or business) is covered, including SEO, SEM (adwords), Analytics, Optimization, useful plugins and more.
You can view the channel here.
