> ## Documentation Index > Fetch the complete documentation index at: https://docs.aftersell.com/llms.txt > Use this file to discover all available pages before exploring further. # Upsells Module > This guide shows how to configure the Upsells module in Upcart The Upsells module enables customers to add related or complementary products to their cart with a single click. Image # Product Selection ## AI Recommended Upsells Enable this setting to use [Shopify's Product Recommendation Algorithm](https://shopify.dev/docs/themes/product-merchandising/recommendations) to suggest upsells automatically. ### Recommendation Algorithm This option appears only if AI recommendations are enabled. Choose your desired **Recommendation Intent**: [Recommendation Intent](https://shopify.dev/docs/themes/product-merchandising/recommendations#recommendation-intents): #### **Related products** Displays similar or substitutable products under a *"You might also like"* section. * **Important:** Products must share a collection to be considered "related." #### **Complementary products** Displays add-ons or accessories under a *"Pair it with"* section. * **Note:** Complementary intent must be manually configured in the [Shopify Search & Discovery app](https://apps.shopify.com/search-and-discovery). The algorithm only auto-generates for “Related” products.\ Learn more in [Shopify's documentation](https://help.shopify.com/en/manual/online-store/search-and-discovery/product-recommendations). ## Smart Variant Matching When enabled, Upcart uses AI to automatically pre-select a variant on an upsell product that matches what the customer already has in their cart, rather than defaulting to the first variant in the list. For example, if a customer adds a black shirt to their cart, the upsell will automatically pre-select the black variant on a paired pants product. If they added a blue shirt instead, the blue variant would be pre-selected instead. Smart variant matching works even when option names aren't identical across products. If no matching variant is found, the customer can still select one manually. ## Manual Upsells Configuration Manual upsells can be set up only when **AI Recommended Upsells** is disabled. Click **Configure Manual Upsells**. Image Click **Add New Upsell** to add a row with: 1. **Trigger Product(s)**\ **Specific Trigger:** Choose at least one product that must be in the cart.\ **All Products**: Display the upsell when *any* product is in the cart. 2. **Upsell Product(s)**\ Select the product(s) to show when a trigger product is in the cart. Image ## Order of Upsell Appearance Upsells are evaluated from top to bottom. To arrange the priority of rows, drag and drop them in the Cart Editor under the **Configure Manual Upsells** section. The system displays upsells based on their top-to-bottom arrangement in the Cart Editor. Image If Products A and C are in the cart, and you’ve set upsells for each, both B and D will be shown. When selecting multiple upsell products in a single upsell row, the order of product selection will determine the order of their appearance in the cart, top to bottom. *** ## Displaying Reviews Upcart can display product reviews on **upsells and product recommendations** to help customers make informed purchase decisions. Reviews are not shown on standard cart line items. Upcart uses the \*\*[Shopify Storefront API](https://shopify.dev/docs/storefronts/headless/building-with-the-storefront-api/products-collections/metafields)\*\*to read review data stored in product metafields. Because of this, reviews will only appear if your review app exposes product review data in a format the Storefront API can access. Image ### Supported review apps At this time, Upcart supports reviews from the following apps: 1. **Shopify Product Reviews**\ [https://apps.shopify.com/product-reviews](https://apps.shopify.com/product-reviews) 2. **Junip**\ [https://apps.shopify.com/junip](https://apps.shopify.com/junip) 3. **Okendo**\ [https://apps.shopify.com/okendo-reviews](https://apps.shopify.com/okendo-reviews) 4. **Growave**\ [https://apps.shopify.com/growave](https://apps.shopify.com/growave) 5. **Fera**\ [https://apps.shopify.com/fera](https://apps.shopify.com/fera) 6. **Yotpo** 7. **Stamped** 8. **Loox** 9. **REVIEWS.io** 10. **Automizely** 11. **Judge.me** 12. **Ali Reviews** 13. **Trustoo** 14. **Rivo** 15. **Rivyo** 16. **Vitals** If reviews aren’t appearing, make sure you’re using one of the supported apps and that the products shown in upsells or recommendations have reviews available. *** ## Troubleshooting If your upsell isn’t displaying, check out the [“Why Isn’t My Upsell Showing?”](/upcart/why_isnt_my_upsell_showing) article in our [FAQ](/upcart/adding_code_to_your_shopify_theme_for_accelerated_checkout_buttons) for common fixes. #### **Next Steps** To fine-tune how upsells behave in the cart drawer, continue to the next guide: [**Upsell Module: Settings**](https://aftersell.mintlify.app/upcart/upsells_module_settings#upsells-module-settings)