On March 21, 2006, Jack Dorsey and his colleagues developed the first version of what became Twitter. The service allowed users to send short text updates, originally limited to 140 characters. What began as a side project grew into a major social media platform. Twitter changed how news spreads, how politicians communicate, and how social movements organize. Hashtags and real-time updates became central parts of its culture. The platform has played a visible role in political debates, social campaigns, and online discussions worldwide.
