Twitter, Inc. offers products and services for users, advertisers, developers and data partners. The Company's products and services include Twitter, Promoted Ads and Twitter Amplify, Follower Ads and Twitter Takeover. Twitter is a platform for public self-expression and conversation in real time. Its Promoted Ads include objective-based features that allow advertisers to pay only for the types of engagement selected by the advertisers, such as Tweet engagements, Website clicks, mobile application installs or engagements, obtaining new followers, or video views. Follower Ads provide a way for its advertisers to build and grow an audience that is interested in their business, product or service. Its Follower Ads are pay-for-performance advertising priced through an auction. Twitter Takeover appear at the top of the list of trending topics or timeline for an entire day in a particular country or on a global basis. The Company sell its Twitter Takeover on a fixed-fee-per-day basis.