Conversion Rate Optimization, known as CRO, focuses on improving the percentage of visitors who take action. Tools like Google Analytics help track user behavior and goal completion. Heatmap tools such as Hotjar show where people click and scroll. A testing tool like Google Optimize allows you to compare two versions of a page to see which performs better. Simple survey tools can also collect direct feedback. Each tool solves a different problem, so combining them gives better insight. Which tools have given the clearest improvements?