Purpose of "arguments"

Can anyone put into “simple” words the purpose of arguments in JS please?

The same purpose as any programming language, passing variables to a function?

There are a couple of different types of arguments. Which ones do you mean?

The ones that are passed to functions, or the arguments collection that all functions have?

The ones that are passed to functions, understand it now. Will be starting DOM tomorrow, get back to you guys, thanks.