Google's always tweaking AdWords, and even for someone that keeps track of things, it's still quite tough to know about them all. Clearly, Google thinks so, too. One way round that is the New AdWords Features page, or to watch us here at WebmasterWorld where we discuss the latest updates. [
support.google.com...]
Starting today, you will find two new resources in the Learn tab of the Help Center that we hope will keep you on top of all the new AdWords innovations and help you understand how they work. The first is a chronological list of product updates. This “New AdWords Features” page shows you what’s happening in AdWords all in a single place: from reporting improvements to new ad format launches. For example, if you visit the page today you’ll see that eligible Flash ads can now be automatically converted to HTML5 on the Google Display Network. You'll also see that we recently rolled out a service release for AdWords Editor, which included some improvements to reporting.Keeping Track of Google AdWords Updates, Now All In One Place [adwords.blogspot.com]