Conversion Rate Optimization (CRO) is the process of systematically refining and enhancing a website or marketing campaign to maximize the percentage of visitors who take a desired action, such as making a purchase, signing up for a newsletter, or filling out a contact form. It involves analyzing user behavior, conducting experiments, and implementing changes to improve key metrics. CRO encompasses various strategies, including optimizing website design, streamlining the user experience, crafting compelling content, and fine-tuning calls-to-action (CTAs), with the ultimate goal of increasing conversion rates and driving business growth.