AdRoll is a widely-used ad retargeting platform that is used by a number of brands to retarget users with ads across social media, mobile, and the web. AdRoll offers solutions for both enterprises and agencies of all sizes. The retargeting app helps user to reach site visitors at the most optimal time with the most appropriate ad on any screen.
Gmail is a free, advertising-supported email service offered as part of Google's G Suite, with 15GB of storage, color-coded inbox filters and unsend button.