Changes included the ability to see pictures and videos without leaving Twitter itself by clicking on individual tweets which contain links to images and clips from a variety of supported websites including You Tube and Flickr, and a complete overhaul of the interface, which shifted links such as '@mentions' and 'Retweets' above the Twitter stream, while 'Messages' and 'Log Out' became accessible via a black bar at the very top of
As of November 1, 2010, the company confirmed that the "New Twitter experience" had been rolled out to all users.
Dick Costolo, formerly Twitter's chief operating officer, became CEO.
On October 4, 2010, Williams made an announcement saying that he will stay with the company and "be completely focused on product strategy".
The decision was also partly due to the fact that domain was already in use, and it was six months after the launch of twttr that the crew purchased the domain and changed the name of the service to Twitter.
In October 2006, Biz Stone, Evan Williams, Dorsey, and other members of Odeo formed Obvious Corporation and acquired Odeo, together with its assets—including and Twitter.com—from the investors and shareholders. They called it a social network, they called it microblogging, but it was hard to define, because it didn't replace anything.
On March 21, 2012, Twitter celebrated its sixth birthday while also announcing that it had 140 million users and 340 million tweets per day.
On February 21, 2012, it was announced that Twitter and Yandex agreed to a partnership.
Yandex, a Russian search engine, finds value within the partnership due to Twitter's real time news feeds.
The number of users was up 40% from their September 2011 number, which was said to have been at 100 million at the time.
Twitter released Vine as a standalone app that allows users to create and share six-second looping video clips on January 24, 2013.