CRO typically starts with quantitative analysis (funnel drop-off, heatmaps, session recordings) to identify friction points, followed by qualitative research (user surveys, usability testing) to understand why visitors aren't converting, and finally structured A/B or multivariate testing to validate changes before rolling them out broadly.
Because CRO improves the yield of existing traffic rather than requiring more of it, gains compound across every channel feeding that page — the same PPC or SEO traffic converts at a higher rate without additional ad spend.