The click-through rate (CTR) is a crucial metric for evaluating the performance of online marketing campaigns. It measures the percentage of users who click on a particular link or advertisement out of those who have viewed it. For retailers, a higher CTR signifies that their online content, such as product ads or promotional links, is resonating with the audience and driving engagement. Monitoring CTR allows retailers to gauge the effectiveness of their digital marketing efforts, optimize campaigns, and enhance the overall online shopping experience to better meet customer expectations and boost conversions.