Conversion rate is the most-watched metric in ecommerce because it directly measures how effectively traffic turns into revenue. A store that improves conversion rate captures more value from the same traffic and marketing spend, without needing to acquire additional visitors. In fashion specifically, the online-to-physical conversion gap is unusually wide compared to other categories, which points to a specific, addressable cause: physical retail has a built-in decision-support mechanism (a sales associate) that most online stores lack entirely.