A recent study by the Neilsen Company shows that the use of online social networks increased two hours a month from last year. According to the February 2010 report of countries with the most usage, the United States — which has the largest unique social networking audience — ranked third with the average person spending just over six hours (6:02:34) per month on social networks. Facebook is the number-one social network destination worldwide and accounts for nearly six hours (5:52:00) per person with the average user logging in more than 19 times per month. For more on the study, read Jennifer Van Grove’s article in Mashable, the Social Media Guide.