what's a bookmark ? marking a spot in a playlist maybe ?

Essentially, you can keep three playlists around and switch between them, remembering the content and position for each. You can keep one for, let's say audiobooks, one for your music choice and one for your SO's music choice. I imagine you can also have a scratch playlist that you don't save, for instance for when demo'ing the player or with guests in the car.

If you're on a quest to hear every track on the player, you currently lose your position in the playlist (and if it was shuffled play there's no way to get back that precise order) if someone makes a new search or selects another playlist - bookmarks solve this.

/Michael