Composing checkout with drag-and-drop blocks moves a category of work out of the development queue.
Checkout Components reached general availability for Plus merchants in 2026, allowing the post-cart flow to be composed with blocks.
It moves layout and arrangement out of development while logic stays in Functions and UI extensions.
The governance question is new — several people can now change the page that takes money, with no review step.
Checkout completion rate, not store-wide conversion, is the number that isolates whether a change helped.
A way of customising the post-cart flow using drag-and-drop blocks rather than code, generally available to Plus merchants as of the Summer 2026 release.
The full guide has the formats, the deadlines and the worked examples.