Yea you want a minimum of 10 locations/areas of interest if you are in a small market. If you are in a big market you don’t need as many. You can’t over restrict targeting or it won’t work...also make sure you are excluding the rest of the world & every other state. The app traffic & display is rife with bot traffic so you want to make sure you don’t have too wide of a target. To Christines point, make sure you watch user metrics so you can flag bad traffic. Sadly ad networks make it easy to waste Money.