Your Commerce Cloud instance initially has a single site, or store. You can, however, run multiple sites from a single Commerce Cloud instance. Each site corresponds to a store. If your store supports multiple sites, you can specify that a promotion applies to items purchased only from specific sites. For example, if you have a site focused on seasonal decor, you may want to apply a promotion only to items sold on that site.

When you create a promotion, you use the Sites field to specify the sites on which the promotion is valid. If you select one or more sites, the promotion is valid only for those sites. If you select the Applies to all checkbox, the promotion is valid on all sites.

Note: Promotions you created in earlier releases are automatically valid for all sites. If you create multiple sites and want to make an existing promotion valid only for specific sites, you must edit the promotion and specify those sites.