Keywords, Categories & Amazon SEO
Chapter 3 covered choosing which niche and category to enter. This chapter covers making sure Amazon's own search actually surfaces your book once it's live — the difference between a good book that never gets found and one that does often comes down to this.
The Seven Backend Keyword Slots
KDP provides seven keyword/phrase fields at publish time. These aren't shown to shoppers — they're fed directly to Amazon's search index, and they're one of the most underused levers new publishers have.
- Use full phrases, not single words. "budget planner for beginners" is more useful than "budget," "planner," and "beginners" as three separate slots — a phrase captures how people actually search.
- Don't repeat words already in your title or subtitle. Amazon already indexes those — a keyword slot repeating them is wasted space that could capture a different search instead.
- Avoid irrelevant or stuffed keywords. Cramming in unrelated high-traffic terms to try to get extra visibility violates KDP's content policies and risks the listing being suppressed rather than boosted.
Your Subtitle Is Also Searchable
The subtitle field is indexed by Amazon's search, not just decorative — a well-chosen subtitle can genuinely capture additional keyword real estate beyond the seven backend slots. It still has to read naturally to a human browsing search results, though; a subtitle that's obviously a keyword dump undermines the professional impression the cover (Chapter 6) is trying to create.
Notice none of the seven keyword phrases simply repeats "budget" or "planner" alone — each one captures a genuinely different way someone might search for this exact book.