Opt-in is a term related to data privacy. It means a permission given to marketers or data to use the information about the user or perform other marketing activities.

Opt-in is a legal marketing approach when a marketer asks for users’ permission in order to send them promotional content. Opt-in can be full or partial, which means the user can agree to all or just some marketing activities.

Under GDPR , companies are required to ask for consent for sending any advertising messages unless they are processing personal data on the basis of legitimate interest.

Here’s an example of an opt-in placed on the Piwik PRO website – an additional checkbox in a download form:

More about opt-in on Piwik PRO blog:


  • What is considered protected health information (PHI) under HIPAA? A guide for healthcare marketers

    Quick summary What PHI is: Any individually identifiable health information created, received, maintained, or transmitted by a covered entity or its business associates Who it applies to: Healthcare providers, health plans, healthcare clearinghouses, and their business associates Why it matters for marketing: Marketing tools that collect or transmit PHI without a BAA create HIPAA compliance…

  • We checked 59 hospital websites. 73% kept tracking visitors after opt-out.

    A new study by Piwik PRO and Verified Data scanned 59 major US hospital and clinic websites for tracking and data compliance. The findings show just how common it is for major US healthcare websites to run marketing tools that weren’t built for a regulated environment. What we actually found Across the 59 scanned sites,…