Definition
Consent granularity refers to how specifically a subscriber's permission is defined. Low granularity means a single blanket consent for all email communications. High granularity means separate consent for each email type — promotional emails, newsletters, transactional notifications, product updates, third-party offers, and behavioural triggers. Higher granularity provides stronger legal protection and better subscriber experience but reduces initial opt-in rates and increases database complexity.
Examples
- Low granularity: "Yes, send me emails" checkbox
- Medium granularity: Separate checkboxes for marketing and transactional emails
- High granularity: Individual toggles for newsletter, promotions, product updates, partner offers, event invitations, and frequency preference
Best Practices
- Match consent granularity to the complexity of your email programme and the regulatory requirements of your audience
- Collect granular consent progressively — start with broad categories and offer refinement in a preference centre
- Honour the granularity of consent in your sending logic so subscribers only receive what they agreed to
- Document consent granularity decisions in your compliance records alongside the consent itself
- Test the impact of granularity on opt-in rates and adjust the balance between detail and conversion
Related Glossary Terms
A/B Testing
A/B testing in email marketing is the practice of sending two variations of an email to a small sample of your list to determine which version performs better before sending the winner to the remaining subscribers.
Abandoned Cart Email
An abandoned cart email is an automated message sent to customers who added items to their online shopping cart but left without completing the purchase. It is one of the highest-converting email types in ecommerce.
AIDA Model for Email
The AIDA model (Attention, Interest, Desire, Action) is a classic copywriting framework used to structure email campaigns that guide subscribers from awareness to conversion.
AMP for Email
AMP for Email is a Google-developed framework that allows email messages to include interactive elements like forms, carousels, accordions, and live content. It turns static emails into dynamic, interactive experiences directly inside the inbox.
Anchoring Effect in Email Marketing
The anchoring effect is a cognitive bias where the first piece of information presented (the anchor) influences subsequent decisions, used in email to frame pricing and value perception.
Announcement Email
An announcement email is a dedicated campaign that communicates a specific update, milestone, or change to subscribers, from product launches and feature releases to company news and events.