Interview preparation defaults to breadth: fifty common questions, a page of company facts, some advice about eye contact. Breadth is the wrong shape, because you will be asked eight questions and about three of them will decide it. What you need is depth on the small number that apply to this role, this stage, and this gap in your experience.
Section three is the point of the whole thing. It takes the likely questions and checks them against what you have actually described, then names the ones where you have nothing prepared. Those are the questions you would have discovered in the room. Finding them the night before is not the same as answering them well, but it is the entire difference between a gap you have thought about and a gap you meet live.
Section one matters more than it looks. A recruiter screen is deciding whether you are plausible and affordable; a panel is deciding whether people want to work with you. Preparing for the wrong one produces a candidate who is over-prepared and still wrong.