Advertising helps you keep your current customers.

It's easy to fall into the trap of thinking that advertising is all about getting new customers. That's certainly one reason to advertise. An equally important aspect, however, is the roll it play in helping you retain your current customers. We all are very insecure about the decisions we make throughout our lives; we internally question those decisions almost constantly. When we see an ad for a company we use, it validates our decision to chose that company. On the other hand, if we don't our memories can get very fuzzy.