You can write your topic however you want, but you need to answer these questions:
What do you want to achieve? Keep it simple and clear!
I want to learn about metatables and when to use them.
What is the issue? Include screenshots / videos if possible!
I do not understand how to use it.
What solutions have you tried so far? Did you look for solutions on the Developer Hub?
I have looked on the developer hub, but still don’t get it.
Excellent tutorial by starmaq:
Once you dive into OOP (Object-oriented programming), by JonByte:
Not just for objects, they allow you to extend the functionality of tables in all kinds of ways!
As always, the manual and Programming in Lua book are great resources:
LuaUsers also has lots of info, here’s a list of everything metatables “can do” (all metamethods):
You should also check the Roblox wiki, as there are some Roblox-specific (i.e. Luau) things to keep in mind: