For a variety of reasons, the numbers used to identify accounts via Twitter's API grow faster than the actual number of accounts in the system. Currently, user IDs fit in 32 bits—a standard size for integers on many platforms. In January, we explained that the current pace of Twitter user ID allocation meant that we'd exceed 32 bits sometime this year. All developers should make sure their code will handle the switch.
Hundreds of thousands of websites and publishers embed Tweets to share the best of Twitter with their readers. From world news, to sports, politics and entertainment, Tweets have changed the way breaking news is covered. And they help people everywhere discover important Tweets, even outside of Twitter.