45.6 percent most popular sites Statista most popular sites 5th most popular social media platform most popular social media platform most popular sites second most frequently used social network in the US social media Statista most popular social media network Leading social media websites in U.S. in October 2015 Experian statistic found on Statista statistics. Leading social media websites in U.S. in October 2015 use Facebook each month statistics. most popular sites Statista platforms where their clients might be present most popular sites social media site visits Leading social media websites in U.S. in October 2015 Instagram users and community Leading social media websites in U.S. in October 2015 Statista reports most popular sites