The idea is that you can hold and drag just about any content on the phone -- places, web pages, pictures, people -- to The Spot (a dark circle appears in the center when it's holding content), and then tap it to send the content on to your friends via the service of your choice.
There are basically two ways of throwing things to the rear display: In a customized app (made either by Yota or by a third party using the open APK), you can tap a symbol in the top right corner and the app will send currently displayed items across to the back.