Can someone explain CO and C1 for welding in simple words to me please?

I have been learning LUA from a youtuber named “TheDevKing” and I reached his on how to weld . I know how to weld now but I do not understand how it actually works . I basically could only copy what he scripted down . I would appreciate it if someone explained what the CO and C1 are for me .
I absolutely hate not understanding the things I learn , so it would be very much appreciated .

C0 and C1 are CFrame values for Part0 and Part1.
These values can be changed to alter the position, orientation and much more of the weld.

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Wow , that clears things up a lot , Thank you :slight_smile:

But when you are like making a block above someones head why do you need to put :inverse() afterwards ?

I don’t think you have to use inverse, you’re just looking at a method that uses it.