Create Product Add-on Upsell Offers

When to use this: You want to offer small extras — accessories, services, gift wrapping — alongside a main product.
Product Add-On is similar to Related Products Upsell, but with a different intent and position. It sits closer to the Add to Cart button and is meant for small companion items, not full alternative products. You can run both at the same time: Add-On near the ATC button, Related Products further down the page.
It supports the same controls as Related Products: review stars, compare-at price toggles, card styling, device visibility, and per-offer exclusions. You can curate manually, pull from a collection, or use smart matching, and add an optional discount (percentage or fixed amount).