TrueView video campaigns: Advertisers are now able to create and optimize in-stream and in-display TrueView video campaigns in Editor. This deepens the integration of video campaigns into the main AdWords fold.
Callout extensions: AdWords users are now able to set up and edit callouts right in Editor, as you can with sitelinks.
HTML5 ads: Due to the enevitable removal of Flash ads, and the HTML5 ads that will be replacing it, it’s nice to finally have support for these display ad formats in Editor.
If you already own a copy of AdWords Editor, you’ll get a prompt to restart and update to version 11.3. If you don’t have it, you can download it here.