opt in

US /ɑːpt ˈɪn/
UK /ɑːpt ˈɪn/
"opt in" picture
1.

adhérer, opter pour

to choose to be part of an activity, plan, or group

:
Customers can opt in to receive marketing emails.
Les clients peuvent choisir de recevoir des e-mails marketing.
You need to opt in to the new privacy policy.
Vous devez adhérer à la nouvelle politique de confidentialité.