Words do the selling
It's easy to believe a website succeeds or fails on its design. Design matters — it earns the first few seconds of attention and builds trust. But once a visitor is looking, it's the words that do the persuading. Copywriting is the difference between a beautiful page that gets admired and closed, and a page that gets read, believed, and acted on.
Think about your own behavior. A gorgeous site with vague, generic text ("We deliver quality solutions for your needs") tells you nothing and moves you nowhere. A plainer site whose words clearly say "we fix X problem, here's exactly how, here's the proof, here's how to start" pulls you toward the phone. The copy is the salesperson working the room while the design sets the stage.
This is why copywriting deserves real attention rather than being filled in at the last minute with whatever sounds professional. The words are where the visitor decides.