1. What are opt-in and opt-out ?

👉 Opt-in :

Opt-in refers to the necessity of obtaining explicit consent from the user before collecting, processing, or sending communications. This consent must be a clear positive action, such as ticking a non-pre-checked box on an online form, to indicate agreement to receive emails, SMS, or other forms of marketing communications and solicitations.

Example : A checkbox on a pop-up on your website that the user must tick to give consent.

👉 Opt-out :

Opt-out assumes that the user consents by default to the collection and use of their data or to receiving communications. The user, to refuse the processing of their data or to unsubscribe, must take an active step, such as ticking a box to indicate refusal or actively deciding to unsubscribe.

It is prohibited to use opt-out in B to C relationships.

Example : The case of companies purchasing databases.