Definition
Data minimisation means you should not collect subscriber data just because it might be useful someday. You should only collect what you actually need for your email program — typically an email address, name, and perhaps preference data — and nothing more.
Practical Application
- Sign-up forms: Only ask for fields you will actively use. Every extra field reduces conversion rates and increases compliance risk.
- Data retention: Delete or anonymise data when it is no longer needed for the purpose collected.
- Third-party data: Avoid enriching subscriber records with data from external sources unless you have documented consent.
- Periodic review: Audit your subscriber database fields annually and remove any that lack a current use case.
Why It Matters
Collecting excessive data increases your compliance burden, breach risk, and storage costs. Under the GDPR, you must be able to justify every piece of personal data you hold. If you cannot explain why you need a field, you should not be collecting it.
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.