Flipboard is known as the first social magazine for the Facebook.
The contents of the magazine are from everyone sharing on the social network, therefore, when you start to use Flipboard, you were being asked for your twitter, Facebook, or other social network accounts.
However, this was not the first, the Social Aggregator was designed for the same purpose a few years ago. However, since the social Media was not popular, therefore Social aggregator was not really popular
Today, many popular magazines puts out applications on the iPad for easy access. And since social media is so popular today, therefore Flipboard really became an important social magazine for the world.