The collapsed ad that users initially see that matches the look and feel of the Gmail inbox. Users can click on this to expand it and get more details.
The expanded ad unit is triggered by a click on the collapsed ad. This is a full-page native ad that recreates the informational and visual richness of a landing page. After users click to expand, any subsequent clicks on your content are free, including clicks to save the ad to your inbox or forward it to others.
