DoubleClick is a provider of digital marketing technology and services. It offers technologies and services that are primarily sold to advertising agencies and mass media companies. These are to be made possible thereby to act more purposefully and switch interactive advertising campaigns. Companies use DoubleClick for ad serving, media, video, search and affiliate marketing purposes.

Twitter is an online social networking and news service that enables users to read and send short 140-character messages called "tweets". Registered users can both post and read tweets while unregistered users have read access only. Twitter allows user access through the website interface, SMS and with the mobile app.