You will never know if your advertising will work if you're not tracking advertising campaigns. Let's say you put up ads in five different places. You start receiving calls, but now, you don't know where people are learning about your business. When it's time to spend more money on ads, you don't know which ones have done the best for you. You decide to stop one ad, but it was the best performing one, and that kills the number of leads you're getting.