A place where you can upload your own creations, or show off something you really like.
An "edit" is usually a simple, seamless presentation of one or more merged images, usually "from left-to-right," but not always.
A "collage" is a more complex, seamless (or non-seamless) presentation of one or more images.
Here are some edits by one of the masters, EVE:
Get to work on your own seamless imaging, Phunners. There's too much talent here not to give it a try!