It's just visual bookmarking, with the addition of your bookmarks being categorised how you like and publicly visible. You sign up for pinterest. You create a

It's just visual bookmarking, with the addition of your bookmarks being categorised how you like and publicly visible. You sign up for pinterest. You create a couple of different boards. You install the pinterest extension. Now when you browse the internet and you see an image you like you clicky the browser button (from the extension) and select what board of yours you want it to go to. Or you can visit Pinterest and search for a thing, and browse the results, and then save some of those things to your boards. Other people searching Google or Pinterest for a thing may be shown a link to your Pinterest board, and that link will include a link to your profile and your boards. I agree the UI sucks, but all UI sucks. Pinterest's sucky UI isn't particularly worse than all the others.