You have applied under early action, rolling admission, or restrictive early action and you’re in.
We now encourage you to do the right thing. If you know you will not enroll at some of the other colleges on your list, don’t continue with your applications to them. Go back through that original list and cross off those schools. Or, if you’ve already sent in your applications, let those colleges know your plans.
Don’t collect trophies in the form of admission letters from colleges you will never attend.