A Conversion Rate Optimization (CRO) agency may provide the following services: 1. A/B and multivariate testing (design, copy, placement, and more) 2. User research (survey, feedback, case studies, and more) 3. Landing page optimization 4. On-page and off-page technical SEO 5. Personalization strategies 6. UI/UX 7. Copywriting 8. Lead generation Do note that the services may vary from agency to agency and industry-wise too. For instance, eCommerce CRO agencies may offer specialized checkout processes, cart recovery services, and more. A SaaS CRO agency may focus its services more toward optimization of features, benefits and more.