How it works it that when you are on the internet and you see a picture of something you like you "PinIt" to boards that you set up. You can set up as many boards as you would like. Here are just a couple of the boards that I have: Anna's Room, Scrapbooking Layouts, For Home, Photography, Sewing Ideas, etc.
Here is a snapshot of my pinterest site:
You can these click into a specific board to see everything that you have pinned. For example, here is my sewing board:
I love searching the pinterst site itself to see what everyone else has been pinning. There are soo many great ideas out there and I love being able to visually them them all at once now.