What does require() do?

[xZylter]

All I did was search “Roblox require()” on Google.

What is require and how do I use it?

I have made a script and want to place it into a game without leaking it’s true code. I have seen this be done with many things, like admin loaders where ‘require’ is used. So like this require (1234567890) How would I use require to keep a script secret? My script is basically an Admin Script.