What's the difference between Single-SKU and Multi-SKU bundles?

Simple Bundles offers two bundle configurations: multi-SKU and single-SKU. Multi-SKU bundles allow for component-level fulfillment when an order is placed, while single-SKU bundles do not.

Multi-SKU bundles means that the bundle product and its components are identified by separate SKUs during fulfillment. This means that when a customer orders a bundle, you'll see both the bundle product and its individual components. In the back-end, Simple Bundles adds the bundle components after the order is created.You can also opt to only see the components and not the bundle product with Single-SKU bundles. 

Single-SKU bundles

Single-SKU bundles, on the other hand, means that the bundle product and its components are identified by only one SKU during fulfillment. When a customer orders a bundle, you'll only see the bundle product, not its individual components. Unlike Multi-SKU bundles, Simple Bundles does not edit the order to add bundle components to the order. This option is best if your bundles are already pre-packaged and ready to ship, as your fulfillment team won't need to search for individual components. In addition, you can still choose to show the itemized bundle contents on packing slips, even if these items are not added to Shopify orders. Learn more about Single-SKU bundles. 

Inventory syncing for Multi-SKU and Single-SKU bundles

Both options allow you to track inventory for the components separately, so you can accurately keep track of how many items you have available for building bundles. This means that by tracking the inventory of the components, you'll never oversell your bundles and can ensure that you always have the necessary components on hand to fulfill customer orders.