Gmail advertising, also known as Gmail sponsored promotions or Gmail ads, is a highly effective digital marketing strategy that allows businesses to promote their products or services directly within the Gmail inbox of potential customers. Here's a description for Gmail advertising:
Ad can be featured next to an email and up to two under the ‘Promotions’ tab.
Overall interaction with the ad have proven to be higher than in the standard Gmail text ads
Placed in a unique premium location without any comparable competition.