 Here's what they know. While internet targeted advertising can be useful, it's weak at getting new customers. They know if the customer knows you before they need you, you get to click more often. That's where they turn to radio and TV. This doesn't mean internet advertising is wrong, flawed, or useless. Quite the contrary. It's a perfectly viable way to advertise. But if someone tells you to throw all your advertising on the internet, tell them you will.