opt in(to something)

opt in(to something)

To choose to participate or be involved in something. I don't usually opt into guided tours, but I'd heard good things about this one. Any student who wishes to opt in needs to have their permission slips handed in by the end of the week.
See also: opt

opt in(to something)

to choose to join in. She opted into our plans. She opted in almost immediately.
See also: opt