Unblocking someone on Twitter is the process of reversing a previous action where you blocked their account. When you block someone, they are unable to see your tweets, send you direct messages, or follow you. Unblocking them will allow them to do all of these things again.
There are a few reasons why you might want to unblock someone on Twitter. Maybe you had a falling out with them and have since reconciled. Maybe you accidentally blocked them. Or maybe you simply changed your mind and want to give them another chance. Whatever the reason, unblocking someone is a simple process that can be done in just a few steps.