What is an Opt In?

Similar Terms:

Verified Opt-in, Double Opt-in

Opt-in is a term used in email marketing to describe the process of someone who voluntarily signs up to mailing list.

Double (or verified) opt-in is the technique of requiring that a subscriber confirm their sign-up by clicking a link in an email sent to them before their subscription is completed. This is required under anti-spam law in some countries.

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