You’re actually using jargon to explain jargon here. Try explaining all of this from the user’s perspective.

Terms of art exist, and none of these are unknown terms to people in the field. Jargon is specifically used to communicate certain ideas without defining each and every single term. If you were in an aerospace field and people started talking about various types of engines and propellers, you'd be expected to know what it means, but for some reason people think computing and UX is somehow different, as if a lay person should perfectly understand it without learning any new terms.

Which terms/explanations are confusing?

Sign-up friction, bounce rate, touch points, bloat

Sign-up friction: how much effort it takes to sign up; many times because it's hard to find the sign up page or the page itself has too many steps

Bounce rate: a bounce is someone visiting your site and not signing up. A bounce rate is the amount of people that do this compared to sign ups

Touchpoints: things a user interacts with, like a landing page, a nav bar with a sign up button, the sign up page itself, forms on that page, etc.

Bloat: too much "stuff" that is unnecessary towards some end goal like too much copywriting on the landing page, or too complex of a sign up flow, etc.

This isn't snark, but this is all industry standard terminology.