Vistual Studio Install Question \ Confusion

(This really should go in S01 for Lecture 3, but I can’t select S01 as group or add discussion there)

Back in Lecture 3.
We’re shown to add “Visual Studio Extensibility Tools Update 1”
(This is ~2:00 Mark in the lecture video)

I looked at Epic’s documentation and there’s no reference to this module at all. So I’m confused about it’s purpose and more importantly if the tools update aren’t installed, am I hosed?