Found something useful in Shopify's changelog this week: discount Rollouts. Before this, a store-wide discount was binary, live to 100% of visitors or off. Now a discount can ride inside a Rollout and go out to a limited slice of your Online Store traffic first, so you can watch how it actually performs before expanding it to everyone. One catch worth knowing: partial-traffic Rollouts only apply to the Online Store channel, POS and your other sales channels only see the discount once it's rolled out to 100%. Worth remembering before the next sitewide sale, test a slice first, check conversion and AOV, then go wide instead of flipping a big promo live and hoping.