Gmail sponsored promotions are an ad format which lets you reach customers using gmail. It is a rich ad format allowing for use of features such as images, text as well as allowing for things such as forms to capture sign-ups, customer information or other submissions in the ad itself. Targeting options are very similar to a display campaign; you can target by user interests, keywords, demographics. An example of how this works is if you have an ad targeting “running shoes”, someone who had received recent emails from shoe stores would be eligible to see your ad. Read more about Gmail sponsored promotions below.