For anyone reading this thread and not knowing what the terms being tossed around mean, but curious, there was recently a thread here [0] with some resources that you can check out to understand the space a bit. I devoured two of the three books [1], [2] in about 4 days total, they're really easy to get through, definitely recommend.

[0] https://news.ycombinator.com/item?id=35714145

[1] https://www.amazon.com/Field-Guide-Global-Payments/dp/057829...

[2] https://www.amazon.com/Anatomy-Swipe-Making-Money-Move/dp/16...