How does the Watchlist / Favorites work?
The Watchlist allows you to create a personalized list of shows you want to watch while they are available on HBO GO. Once you find a show you want to watch, select the “Add…” option to add the show to your Watchlist, (on some devices it may just say "Add to Watchlist"). You can add an unlimited number of shows The items in your Watchlist throughout all of your devices. Shows will remain in your Watchlist until you remove them or they become unavailable.