Agreed, don't take 56% as fully being attributed to smaller page loads. In two weeks after the change with out any other changes to traffic or anything else, t

Agreed, don't take 56% as fully being attributed to smaller page loads. In two weeks after the change with out any other changes to traffic or anything else, the improvement was 38%. I've talked about my findings with more caution here: https://ecommerce.shopify.com/c/ecommerce-discussion/t/shopify-image-quality-optimization-round-2-with-stats-38-improvement-304813 https://ecommerce.shopify.com/c/ecommerce-discussion/t/shopi... My worst day after this change, was better than my best day previous to this change. Thousands of visitors. This trend has continued for 4 months after the change. Hundreds of thousands of visitors. I'm the only dev on this project and I know what changes day to day. Can full 56% be attributed? No. I added opt-in monster with 10% & 20% (A/B) discount in Feb which boosted conversions. 10% actually out performs 20%. Go figure. Can more than 0% be attributed to smaller images. Yes. So I'd say this change helped between 0% and 56%. Either way, it's statistically significant. 4MB savings on homepage going to save you from a shit tonne of bounces and help move more people towards that checkout page.