How does a new KDP writer supposed to market a book?

B) that are filled to the brim with typos or errors.

If your book is well presented, well written, and basically free of typos, then

How does a new KDP writer supposed to market a book?

NASA robot for drilling on icy moons tested on Alaskan glacier - Ars Technica

C) that are unreadably terrible in any other way.

C) Persuade book reviewers on BookTok or Substack or someplace to recommend your book. If your book is unreadably terrible, this is probably impossible.

You cannot effectively promote books

Why did Cartman love Heidi purely with heart, her being the first one he ever did, but then one day Butters tells him that all women are manipulative and then he began to believe that she was a bad person and pretended to be a victim?

A) Build a following on social media, a following of people who will buy your books. Good luck with that. There is very little evidence that social media can translate to sales.

B) Build a newsletter mailing list of people who will buy your book because they trust you to write books they want to read. This is slow, but ideal.

Or

Homophobia is clearly a harmful mental sickness. What can LGBT people do to cure it?

E) Take a solid year to learn how to use Amazon or Facebook ads and be prepared to lose quite a bit of money as you figure it out.

D) that are presented with bad covers, bad descriptions, or ludicrously bad interior formatting.

Are you planning to proofread your book to avoid sentences such as

What are the most outrageous violations of restaurant buffet etiquette have you seen?

D) Pay promotion services like Written Word Media to promote your book. Legitimate services will not accept your book for promotion if the presentation is crappy or the book is badly written.

Or

A) that are not actually books.

Why are German films often so formulaic even though Germany is a European culture? I love them but they follow formula very closely like Hollywood. What are the best German films?

Because you cannot persuade readers to buy any book in which sentences do not make sense. This shouldn't be “does.” If you don't see the problem, that is a big problem.