Where Ecommerce Businesses Commonly Lose Potential Revenue and How to Fix Conversion Leaks

Where do ecommerce businesses usually lose the most potential revenue? I’ve been thinking about this lately. A company can have: → Good products → Decent traffic → Paid ads running → An email list → A solid-looking website …and still leave a lot of money on the table. Sometimes the problem isn't getting more visitors. It’s what happens after the visitor arrives. Weak offers. Poor product-page messaging. Too much friction at checkout. No upsells. Weak follow-up. Customers buying once and disappearing. I’m curious — for those working in sales/growth: What’s the biggest conversion leak you see businesses making over and over again? I’d love to hear what you’re seeing in the wild.