After you finish editing your photo in Picnik now you can share your photo through Twitter. Picnik uses Photobucket’s TwitGoo API to send out the tweets with the picture’s hyperlink. Sending a tweet out from Picnik lets you compose a message with 110 characters. The other 30 characters that Twitter allows is used for the hyperlink itself.
To start using the service, you have to link your Twitter account with Picnik. Picnik saves your Twitter credentials. The service also asks you if you want to make the edited picture your Twitter background or profile picture.