Importing and exporting of catalogs are useful in various scenarios. When setting up an Optimizely Commerce site, you need to get the products into the system. You may also need to import a product catalog as new items are added to an external system's catalog. Or, you might want to move or copy catalogs between websites.
While you can manually create a catalog and add catalog entries, that option is less useful with a large catalog. Instead, use one of the import or export methods to efficiently move products into and out of a catalog.
Catalog import/export is done through code, using the import/export API, or the Service API. See Optimizely World for technical details.