Rule #1 of Marketing is "Marketing to Everyone is Marketing to No One." This means that if your target audience is something vague like "anybody with a pulse," it will be very hard to develop a message or marketing plan that will make a customer sit up, take notice, and really resonate with your advertising. In contrast, if you know who your customer is, you can talk to the specific needs, problems, or points of pain she is experiencing. This leads to highly-targeted messagin