What is he blocks and unblocks me?

As an AI language model, I don't have access to any personal information such as who blocks or unblocks you on social media platforms. However, being blocked means that the person doesn't want any interaction with you on the platform they have blocked you from, and you won't be able to see their profile, posts, or messages. Conversely, if someone unblocks you, it means that they have decided to allow you to interact with them on the platform again.