What does Dot() do?

[Tarleko (WeDoLittleTrolling)]

I need help with this:

math.abs(number:Dot(number))

I dont know how to use Dot() and what this does.
I was looking for more information and I am didn’t find it.
If you know what Dot() does please reply below.

[dmksa123 (dmk)]

The Ultimate Guide to Vector3:Cross() and Vector3:Dot()

Hey there After a lot of more inquisition about these topics, I have decided to make another tutorial! This is going to be the simplest explanation ever made of Cross and Dot, so make sure you follow to the end By far, two of the most puzzling topics in scripting are Vector3:Cross() and Vector3:Dot(). However, after learning what they do, you will realize that they are actually 100x easier than using CFrames even! You will also want to use them in your code when you …