Gmail Sponsored Promotions. Connect with consumers through an innovative and engaging ad format designed specifically for Gmail. Teaser ad is displayed in email pane or Promotions tab on desktop and on the Promotions tab on mobile. The ad will open and expand as an email, in which the user can save to his/her inbox and forward to a friend. The flexibility of GSPs creates opportunities to promote a variety of consumer actions. Customize ads based on the most valuable user behavior. Gmail Sponsored Promotions are designed to reach users -- not cookies, not emails, not placements. Unique targeting makes it possible optimize for a specific audience.