What is Cross-selling?
In short
Cross-selling means offering a customer a product that complements the one they are already buying: a case with a phone, filters with a camera, socks with boots. The goal is not to sell something more expensive, but to complete the order with something genuinely useful.
A classic example: 'Would you like fries with that?'. On Shopify, this means recommending a phone case to a customer who just added a smartphone to their shopping cart.
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Try ShopifyHow it works in practice
Cross-selling starts with one question: what else does this customer need for the product to work properly? The answer gives you the pairs. A mattress goes with a protector, a camera with a memory card, a paint set with brushes and tape.
On Shopify, recommendations can appear on the product page, in the cart drawer, in the cart itself, or on the order confirmation page. Some apps generate suggestions automatically from past orders; others let you pick them product by product. For a small catalogue, manual pairs almost always perform better, because you know what belongs together.
Bundles are the other common mechanism: the main product plus the accessory at a combined price. Here the customer sees the benefit of taking both, instead of being expected to notice a recommendation widget somewhere on the page.
Why it matters for an online store in the EU
The cost of acquiring a visitor is the same whether they buy one item or three, and cross-border shipping makes each parcel expensive. Adding a second item to an existing order is therefore far cheaper than winning a second order later. A pet supplies store that suggests the right toy and treats next to a bag of food ships one parcel for a larger sale, instead of two parcels for two small ones.
Common mistakes
- Recommending products from an unrelated category, simply because they are in stock.
- Covering the add-to-cart button with recommendations on mobile.
- Suggesting accessories that cost more than the main product.
- Linking to out-of-stock items, so the customer lands on a dead page.
- Installing a heavy recommendation app that slows the product page down.
Related terms
- Upselling — the higher-value version of the same product.
- AOV — the metric that shows the direct effect.
- LTV — the long-term value of the same customer.
- Abandoned cart — what happens when you distract the buyer.
- Conversion rate — the number that must not fall.
- A/B testing — how to check that recommendations really help.
- Shopify agency in Europe — implementation and store setup.
- Promotion and content — the campaigns that bring the first order.
Frequently asked questions about cross-selling
What is the difference between cross-selling and upselling?
Cross-selling adds a different, complementary product: a case next to a phone, filters next to a camera. Upselling replaces the chosen product with a larger or more expensive version of the same thing. One increases the number of items in an order, the other increases the value of a single item.
Where should product recommendations appear?
The safest places are below the product description, in the cart, and on the thank-you page after checkout. On mobile, recommendations must never push the add-to-cart button out of view. Inside checkout itself, be careful: anything extra there can distract a customer who was already ready to pay.
How many products should I recommend?
Two or three, chosen because they are genuinely used together with the main product. A long list of generic suggestions reads as clutter and lowers trust. If there is no obvious companion product, showing nothing is better than filling the space with something irrelevant.