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

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.

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

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.

How do I become a Buddhist, and can someone explain Buddhism to me?

Or

Or

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

Elon Musk threatened to decommission Dragon spacecraft. Here's what that would mean for NASA - ABC News

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

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.

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

Why does my crush always looks at me in a sad way whenever I talk with other boys, and if he catch me staring on him then he go and flirt with other girls and then check if I am looking at him?

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.

A) that are not actually books.

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

Should we consider deporting democrats to Canada?

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

C) that are unreadably terrible in any other way.

You cannot effectively promote books

Why is Russia always right? All eyes toward Russian glory!

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.