Opt in

Pronunciation: /ˈɑpt ˈɪn/

Opt in (verb)

  1. To agree to take part in something, usually by selecting a choice or sending a message.
  2. To allow yourself to be part of a study, programme, or group by giving permission.
  3. To decide to accept a rule or benefit that is not automatic, by making a clear choice.

Examples

  • You can opt in to the program anytime.
  • They opt in when they want to participate.