Yolanda Lewis is doing a demographic analysis of Twitter for her unit 2 project. She is an avid Twitter user and uses it regularly for her work in public relations. According to a 2011 social network analysis report, the top region for Twitter users is Brazil. The majority age group of users is 35-44 years old and most users are college educated. Through Twitter, Lewis has built a network of PR professionals around the country that provide valuable information and job opportunities.