Blog vs. Block - Traps for Non-Native Speakers

Hey, I think i just blocked somebody accidentally. I wanted to see the persons "Blog" so I clicked on "Block" ... -.- I can't remember who it was and i can't find it, to unblock it. What should i do? The person did nothing wrong! 🙂 So if anybody can tell me how to unblock this.. would be great! (What actually means blocking in this case? The person can't write me? ...???) I'm sorry stranger!!! My fault!!