By Chris Morris

PHILADELPHIA (CBS) – On today’s APP-tastic and outta SITE – Pinterest.

You may have heard people talking about Pinterest. It’s one of the fastest growing apps since FourSquare, but if you’re still unsure what it’s about, here’s a quick rundown.

Pinterest is a pinboard of sorts. You can organize interesting things you find online and share them with others. Think of it as sort of like Flickr, but one where you focus on other people’s photos.

Check out the Pinterest app.