LinkedIn has become the second-most popular social network in the U.S. in terms of unique visitor traffic.
According to comScore, an Internet analytics company, LinkedIn had 33.9 million unique visitors in June compared to 33.5 million visitors for MySpace. LinkedIn still lags behind MySpace in terms of total active users. LinkedIn has about 115 million users compared to an estimated 130 for MySpace.
LinkedIn is an online social network geared towards business professionals. LinkedIn users can search for jobs, post resumes and network with colleagues and other professionals.