What you control. Set in Tacey, per store.
These are the settings on this tool's page in Tacey, in the words the app uses. Where a setting has a default, it is stated.
Recommendation sourceMy rules (the default), or Shopify recommends: Shopify suggests products related to what the customer bought. Your default recommendation is shown when Shopify has none.
Order-total rulesIf the order total falls in a range you set, recommend products priced in a range you set.
Product rules and collection rulesIf the order contains a product, recommend specific products, or products from a collection. The first matching rule wins.
Default recommendationWhat a customer sees when no rule applies: best sellers, new products, products from the same collection as the order, or products or a collection you pick.
Maximum products shown, and maximum quantity per itemHow many products appear at once, and the most of one item a customer can add.
Hide items already in this order, and out-of-stock itemsBoth on by default.
Discount recommended itemsOff by default. A percentage or a fixed amount off each item a customer adds. Nothing is discounted unless you switch it on.
Shipping on recommended itemsAbsorb the cost, so there is nothing extra to pay (the default), or charge a flat amount you set.
Show onThank you and order status pages, the thank you page only, or the order status page only.