This control includes:-

1. This is used to post some images with caption from photos app in any app.(like Facebook, Instagram)

2. This is also used to add items in wishlist from captured images like Amazon do.

3. This control contains whole information about SLComposeServiceViewController (like make table and delegate for callback).

P.S. - while clicking on Get Shared Data button, you can get shared posts includes images URl and text. Now you can upload these images for a public. Make a backgorund task for uploading images.