Maybe you didn't search for Campari, but perhaps a significant number of people going to this restaurant also notice this cocktail (maybe it's presented more pr

Maybe you didn't search for Campari, but perhaps a significant number of people going to this restaurant also notice this cocktail (maybe it's presented more prominently?) and google it. Maybe this topic also comes up more frequently within group of friends of a certain age, etc. So for FB, This restaurant + group of friends = show a Campari ad.