If you have some favorites that you keep rescuing food from, marking them as favorites is a good idea. Doing this guarantees you won’t miss out on your favorite offers, as they appear on top of the offer feed. If you use notifications, you’ll also get notified whenever they post offers.
You can add the venue as a favorite by clicking on the venue marker on the map (1), and then clicking on the star icon next to it's name (2).
You can see and manage your favorites by going to Settings → My favorites