Unsubscribe vs. opt-out, what is the difference?
It depends. There really isn’t a difference most of the time.
I think largely an “Unsubscribe” means someone literally clicked the unsubscribe link in your emails, which would effectively “opt them out” of your marketing.
But there are other ways to opt-out as well, like marking an email as spam - this would result in an opt-out, even though they may not have technically clicked “unsubscribe”.
Does that help? Are you seeing these terms somewhere specifically? Maybe we can explain based on the context.