Twitter Inc was incorporated in Delaware in April 2007. It is a platform for public self-expression and conversation in real time. It provides a compelling and efficient way for people to stay informed about their interests, discover what is happening in their world right now and interact directly with each other. It enables the timely creation and distribution of ideas and information among people and organizations at a local and international scale. Its platform allows users to browse through tweets quickly and explore content more deeply through links, photos, media and other applications that can be attached to each tweet. Tweets are limited to 140 characters of text. This constraint makes it easy for anyone to quickly create, distribute and discover content that is consistent across its platform and optimized for mobile devices. The Company faces competition for users and advertisers. It competes against many companies that attract and engage users and for advertiser spend, including companies with greater financial resources and substantially larger user bases, such as Facebook, Google, LinkedIn, Microsoft and Yahoo. It also competes against smaller companies such as Sina Weibo, LINE and Kakao, each of which is based in Asia. The Company is subject to number of U.S. federal and state and foreign laws and regulations that involve matters central to its business. It is also subject to federal, state and foreign laws regarding privacy and the protection of user data.