I don't know everything about it because I'm still learning things around there, but I'm going to use it to post pics mainly.

I wasn't going to but some of my gifs have ended there and I prefer being there and post them there so I can track them down a bit better (the naive girl in me thinks that I can lol!)

In fact it looks like another blogging system but with several options of posting (quotes, pics, texts, video...) It may be not as quick a posting in twitter but not as slow as other systems...

Don't know if that helps you :S