Meaning of the word "opt in" in English

What does "opt in" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

opt in

US /ɑːpt ˈɪn/
UK /ɒpt ɪn/
"opt in" picture

Phrasal Verb

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

Example:
Customers can opt in to receive marketing emails.
You need to opt in to the new privacy policy.
Antonym:
Related Word: