What site outranks Google in the ratings, tramples Tumblr and leaves LinkedIn in the dust? Pinterest. Moms are the main users—in fact, moms were 61 percent more likely to visit the site than the average American, according to Nielsen report The Digital Lives of American Moms. Dubbed "the hottest social media start-up since Facebook and YouTube," by the 2012 Digital Marketer: Benchmark and Trend Report, Pinterest is now the third most-visited social networking site in the U.S.—trailing only Facebook and Twitter. With over 17 million users, the site is one of the fastest growing internet and social media sites in the world. Entirely user-created, Pinterest has plenty of parent pinners who focus on kid-friendly activities, parenting advice and educational ideas. But if you're feeling overwhelmed with all the options, check out our guide to the Pinterest moms you should follow now.