Getting traffic to a site is maybe half the job. What happens after someone lands is where the actual revenue gets decided, and it's the part most businesses spend the least time on.
Good CRO isn't a redesign. It's a discipline. Testing headlines against each other, simplifying a form by two fields, moving a testimonial higher on the page. Small changes, tested properly, run continuously.
The psychology behind it matters more than the visual polish: what makes someone trust a page enough to hand over their email or their card. Get that right, and the same traffic you're already paying for starts converting at a noticeably higher rate.