If you are signed in, you can create Collections, lists of WoBs which you can curate and share. You can access your collections from the user menu; on desktop it's in the on the top-right of the page, and on mobile it's at the end of the navigation menu.
When you create a collection, you can give it a name and a description, and you can mark the Public checkbox if you wish to make it visible to other users, or leave it unchecked so that only you can view it. After it’s been created, you can go back and change it at any time.
You can add WoBs to your collections while you’re browsing by clicking the “Save” button on the top-right of a WoB.
The Save button will open a popup listing all your Collections. You can mark their checkbox to include the WoB in them. You can save a WoB to multiple Collections, or you can create a new Collection right there from that popup.
There is currently no way to browse a list of public Collections other users have created. You can share your own Collections with others by copying the hyperlink from your browser’s address bar.