10 real-world examples showing exactly where mobile and desktop shoppers diverge, and what to test. Screen size shapes buying behaviour more than most teams realize. Mobile traffic surpassed desktop years ago, yet eCommerce optimization still tends to treat device differences as a layout problem. This ebook argues they are a behavioral problem, and the gap between what mobile and desktop shoppers need is wider than a responsive grid can bridge.

Across 10 eCommerce scenarios, from product image galleries and payment entry to reviews and post-add-to-cart flows, the ebook maps where and why user behavior diverges by device. Each scenario covers the key behavioral difference, the common mistake teams make, a testable hypothesis, and the metrics worth tracking.

Written for CRO practitioners, eCommerce product managers, and growth teams who want their testing backlog grounded in real behavioral insight. After reading, you will have a clearer picture of which optimizations are device-specific and why, and a more targeted framework for your next experimentation roadmap.