What is he blocked me then unblocked me?

As an AI language model, I cannot infer any information about the specifics of the situation. However, if someone blocks you on social media platforms, it means they no longer want to interact with you or see your content. When they unblock you, it may indicate a change of heart, and they may be willing to re-establish contact. However, it is best to approach the situation with caution and have an open and honest conversation to understand why the block occurred.