Whisper to people shopping with your competition
Wouldn't you love to be able to walk into your competitors' stores and tell the people in there about your great deals, or why your service is so much better? Thanks to modern technology you essentially can. Geofencing let's you put a virtual 'fence' around your competition. When someone is inside the fence you can serve them ads. You know why your business is great, now go tell the people who are actively in the market. Not only that, you can specifically serve ads to people who have previously gone to your competitors' locations or your own location. This lets you automatically follow up so that sale doesn't get away.
In our experience, the engagement with these ads is huge. Click-through rates are several times higher than average campaigns. And why wouldn't they be? These are people looking for exactly what you offer. They're out there, Go strike up a conversation.