Twitter started becoming very popular after the 2007 South by Southwest (SXSW) festival. During the event, Twitter usage increased from 20,000 tweets per day to 60,000. The Twitter company set up two very large computer screens in the hallways at the conference. These screens only showed Twitter messages. Hundreds of people at the conference checked on what each other were doing by looking at the many tweets. Panelists and speakers talked about Twitter. Bloggers at SXSW described it to others in a very positive way.