When you tap the LOCATION button, you will see the Locations screen:

Let's study the different parts of this screen.

A Navigation Bar at the top of the screen contains Cancel and Done buttons. A Table View displays a list of locations in table view cells.

You have to tap a row to select a location and tap the Done button to confirm. Once you tap Done, you are returned to the Explore screen and can then pick a cuisine. You can also tap Cancel to return to the Explore screen without choosing a location.