Most websites spend heavily to acquire traffic and then let the majority of it leave without converting. CRO flips the focus: instead of buying more visitors, you get more value from the visitors you already have. That makes it one of the highest-leverage activities a growth team can invest in, because gains compound on top of every existing acquisition channel.
Good CRO is evidence-driven. You instrument the funnel, find where visitors drop off, form a hypothesis about why, and run a controlled experiment to test a fix. Over time those wins stack — and the biggest ones often come from giving hesitant, high-intent visitors a way to get their question answered instead of bouncing.