This part of the script uses a while true do or similar loop to repeat the action indefinitely, effectively "spawn-killing" everyone in the server.
These terms are often used by script hubs to signal that a script hasn't been patched by Roblox's latest security updates yet. Common Features of These Scripts fe loop kill all script roblox scripts hot
Some scripts require you to have a specific item, like a sword or katana, to "finishing move" other players. This part of the script uses a while