Do you currently receive offers or adds via E-mail from either retail outlets you've purchased from, or happen to be vendors of products or services you've searched for via Google? That's called direct marketing. In other words; the vendor is communicating directly to you via electronic mail, texts to your phone, or via those coupon books you receive in the snail mail, not casting a wider net that is broadcasting.
Websites are so 2000. That, and they reach out directly to the consumer who may have searched for a product or service. Cuts out the middleman.