You can add your favorite art to a collection, which is basically an album of others' work. You can have as many collections as you'd like, and they can either be public or private.
Adding to and creating collections
To add art to a collection, or to create a new one, just click the circular “plus sign” icon by the desired piece.
The add to collection icon
Editing and removing collections
You can change the details of any of your collections at any point, including the title and whether the collection is public or private. You can also remove individual items or delete the whole collection entirely.
To view and edit yours, just go to the home page when you're logged in (your dashboard), and click the “My collections” link on the left.
You can also view, like, and comment on the public collections here.