What happens to a promotion without a rule or without a campaign?

It does nothing on the storefront.

• Without a rule: no Promotion Class or discount is defined, so there is no benefit to apply, even if the promotion is assigned to an active campaign.
• Without a campaign: the promotion is not scheduled. To be active, a promotion must be both enabled and scheduled.

How to check

• The Status line at the top of the promotion shows Active or Inactive, the class and the rule
• The Schedule/Qualifiers/Compatibility section lists the campaigns or A/B tests the promotion is assigned to

👉 A promotion can also be scheduled through an A/B test. If it is active without a campaign, check its A/B test assignments.