Marketing & measurement
Opt-in
A person's affirmative choice to receive something or take part.
In everyday use
Someone checks a clearly explained box to receive marketing emails.
What to keep in mind
Buying or downloading is not automatically consent to every marketing use.
Also searched as: email opt in
Further reading
Original explanation and example by Perspectism. Further reading may cover the wider subject, rather than this exact wording. Edition updated 7 October 2026.
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