A subscriber is anyone who has given a business permission, through opt-in, to receive email from it, regardless of whether they've ever actually made a purchase.
A simple answer to what is a subscriber worth remembering: permission is the entire requirement, purchase history has nothing to do with the definition itself.
Subscriber vs Customer
Subscriber vs customer is a distinction worth being precise about, since the two overlap heavily but aren’t identical:
- A subscriber has opted in to receive email, that’s the entire requirement.
- A customer has made at least one purchase.
Plenty of subscribers never become customers, and in most stores, a customer who purchased through guest checkout without opting into email isn’t technically a subscriber at all, even though they’re a paying customer. The two statuses track different things, permission versus purchase, and a healthy list generally needs both tracked distinctly.
Subscriber Status Types
- Active — currently opted in and receiving campaigns normally.
- Inactive, covered elsewhere in this glossary — still opted in but not engaging.
- Unsubscribed — has opted out and no longer receives marketing email.
- Suppressed — removed from active sending for deliverability or compliance reasons, distinct from a voluntary unsubscribe.
The Subscriber Lifecycle in Brief
The subscriber lifecycle tracks the same stages covered under customer lifecycle elsewhere in this glossary, but framed specifically around the email relationship rather than the purchase relationship: someone opts in, engages or doesn’t, potentially converts into a customer, and eventually either stays active or drifts toward inactive and unsubscribed status. Every automation covered throughout this glossary essentially exists to manage some transition along this lifecycle.
Related terms:
Adflipr’s contact management tools track subscriber status automatically, distinguishing active, inactive, and customer status based on real engagement and purchase data.
