According to a new eMarketer report, “Worldwide Social Network Users: 2013 Forecast and Comparative Estimates,” nearly one in four people worldwide will use social networks in 2013. The number of social network users around the world will rise from 1.47 billion in 2012 to 1.73 billion this year, an 18% increase. By 2017, the global social network audience will total 2.55 billion.

via Social Networking Reaches Nearly One in Four Around the World – eMarketer.