How do I share variables between scripts, possibly using _G?

Im starting to learn how to use _G and I've tried to use it as a variable sharer between scripts, but it doesn't seem that there is a possible way to do so. If there is another method I could use, please tell me, I'm always looking for better ways to improve my scripting capabilities.

Module script~

local module = {}

function module.variable()
    ["Variable"] = "something"
end

return module 

From the server/client

local moduleScript = require(game:GetService("ServerScriptService").ModuleScript)

print(moduleScript.Variable) 

i might be wrong

Have you tried using the value instances (BoolValue, IntValue, NumberValue, StringValue, Vector3Value, etc.)? Just set the value objects value then read it from another script.