"School unblocked games" are basically cool web games students can play even if certain websites are blocked on school computers. They usually run right in your browser — no installs, no downloads, and no tricky setup. They're made to be easy to play on school computers without breaking any rules or causing problems.
Since most schools filter out gaming sites as a way to help keep their students on track, unblocked games are really basic and safe stuff — the likes of Pac-Man, Tetris, or small puzzle and strategy games. They even have some small amount of learning value themselves too, helping with memory, logic, or speed.
The silver lining? They won't damage your computer, your data, or the school network. They're virus-free, light-weight, and totally safe for students to play during their free time or breaks. It's just a harmless, enjoyable way to relax between classes.