Advertising one's product or service is one of the most daunting challenges in business today.
Granted, you may know all about the product you are selling, or the service you offer, but how much does your customer know? And, if your product isn't unique, why should a customer select your product?
Unless your company is historically established, very likely your buying public doesn't know who you are, what you represent, or what benefits your product or service has to offer them for their hard-earned money. You can't expect customers to pay for a product or service they know little - if anything - about.