What changed: Shop can now verify who a shopper is while browsing a store, before they make a purchase. This brings faster checkout loading, carts that sync across a shopper's devices, one-tap sign-in, a Buy with Shop Pay button personalized to the last card used, and two-way cart sync between the Shop app and the storefront. The feature is now supported on all browsers.
Who is affected
The source refers to merchants whose stores use the Shop app and Shop Pay; it does not specify which stores are automatically included.
What it means for your business
For businesses using Shop Pay and the Shop app, this means shoppers get a faster checkout, abandoned carts get recovery reminders from Shop, and conversion can improve.
What to do
Confirm the Buy with Shop Pay button is active on your store, and review the checkout and cart-sync changes within your customer experience flow.
When it takes effect
The source gives no separate effective date; the announcement is dated October 5, 2026, and the feature is now supported on all browsers.
Source: https://changelog.shopify.com/posts/faster-checkout-carts-synced-across-devices-via-shop
