How to Add Complementary Products
Checkout Blocks supports showing complementary products within automatic recommendations and as line item upsells. For example, show a different flavor chocolate bar as an upsell (technically a cross sell) for any given chocolate bar.
- First populate the complementary products for any given product. You can setup complementary products across your catalog using Shopify's official Search & Discovery app.
- Enable "Complementary upsells" under Actions on any given Line Item Block within Checkout Blocks.
- You'll then see the complementary upsell button appear on eligible line items in checkout. Add "Display Rules" to the Line Item Block to limit which line items display complementary products: