The San Francisco-based social media company was created nine years ago Saturday with the concept of allowing users to say whatever they want in 140 characters or less.
6/9: Together, we followed those moments as they turned into movements. pic.twitter.com/O9XZ836Pox— Twitter (@twitter) March 20, 2015
The service launched four months later and now has nearly 300 million users worldwide.
To mark the occasion, the company re-tweeted its first tweet ever, sent by co-founder Jack Dorsey which said, "Just setting up my Twitter."