Many dismiss copywriting as something that ad agency people do. Truthfully, all of us need to pay close attention to copywriting if we want to achieve our business objectives.
The goal of a “regular” text is to inform or entertain. The goal of Web copy (and ideally your website in general) is to get people to do something—to sign up, make a purchase, or something similar. Hiring a professional copywriter can be very expensive, which is one of the reasons why this is a valuable skill to have yourself.
via Quick Course On Effective Website Copywriting | Smashing Magazine.