Understand site-specific promotions

If your store supports multiple sites, you can specify that a promotion applies to items purchased only from specific sites.

Your Commerce instance initially has a single site, or store. You can, however, run multiple sites from a single Commerce instance. Each site corresponds to a store. For example, you might have a site that sells jerseys for a specific team, and 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.