A Tracklib collection is a playlist of tracks that you can save and listen to whenever you want.
To create a collection and to add a track to your collections: click on the plus-symbol in the track player, and choose to add to an existing created collection or to create a new collection for which to add the track.
You can also click this symbol to remove a track from a collection.
To edit your collections: select the collection you want to edit and click on "Edit". From here you can rename your collection, set the collection's description, add a cover image for the collection or change its privacy settings.
If they are private, only you can see them. The public ones can be viewed by any user, but they will only find them if you share the link.
To share a collection: select the collection you'd like to share and click on the drop-down menu in the lower right corner. From the drop-down menu, select "Share collection".
If you don't see the option "Share collection", it's probably because your collection is private. Click "Edit" and choose public - you should now see the sharing option in the drop-down menu.