is the domain where Twitter users can enter their username in order to view their first tweet on the social media. The service is not restricted to the user itself, it also allows the visitors to view first tweets of various other people.

Twitter makes money from ads in the form of "promoted tweets" in timelines and it needs strong growth to keep its momentum.

The number of worldwide users was up just nine million from the figure of 232 million when Twitter went public last November, suggesting only modest growth at a time when investors were looking for a surge.