eBay Shop's Cross Promotion
tools help you show the right product to your buyers at the right time. Cross-promotions help you sell more because they prominently display the other items you're offering, thereby encouraging buyers to purchase additional items or higher-value items.
Increase your sales by cross-promoting:
Higher-value items when a user views your listing
Similar items when a user views your listing (for example, a different size or color)
Complementary items when a buyer bids on or wins one of your items
Accessory Items that go with the item your buyer just purchased
Setting up these cross-promotion relationships is completely free for sellers with an eBay Shop subscription. Here's how it works:
Every Shop seller has default cross-promotion rules to promote items in the same or similar categories. You can change your default rules to promote more targeted items.
When you list an item in one of your custom Shop categories, cross-promotions are automatically selected based on these default rules.
When a user views one of your listings, four additional listings (based on your cross-promotion rules) will be shown below the item description.
When a buyer bids on or wins your item, another four listings will be shown on the page they see after bidding/buying.