[[ ... ]] defines a multi-line which allows the person to write something that usually goes in just 1 line in several, it pretty much only helps with organization purposes inside of the script. writing that without "]]" would probably work like this:
1 | return require(script.Parent.CSV)(tm,move 1 ,Hone, Claws, 118 ,Rock, Climb) |
This is just one of the very little things that Lua has that most people dont ever use, you can read more about this and other similiar stuff here: http://rigaux.org/language-study/syntax-across-languages-per-language/Lua.html
I hope this helped!