Amazon Visibility
Amazon book keywords: the 7 slots that decide who finds you
Every book on Amazon gets exactly seven backend keyword slots. They are the quiet machinery of discoverability — the difference between a reader finding your book and never knowing it exists. Most authors fill them in sixty seconds and never think about them again. Here is how to use them like they matter, because they do.
You get 7 slots, and each holds a phrase — not a word
A "keyword" in KDP is really a search phrase of up to 50 characters. "romance" wastes a slot; "small town enemies to lovers romance" earns one. Phrases match the long, specific searches real buyers type.
Match demand, not vocabulary
The best keyword is the intersection of two things: a phrase readers actually search, and a phrase that truly describes your book. Guessing from your own head misses the first half; that is why live search data matters.
Don’t repeat your title, subtitle, or category
Amazon already indexes those. Repeating them in your 7 slots wastes discoverability. Use the slots for phrases those fields don’t already cover.
No competitor names, no "free", no bestseller claims
Amazon prohibits other authors’ or books’ names, promotional terms ("free", "on sale"), and unverified claims ("bestselling"). They can get your keywords stripped or your book flagged.
Mix head terms with long-tail
A couple of broad, high-demand phrases for reach; several specific long-tail phrases you can realistically rank for. All seven working together is what moves you up the results.
Fill all 7 from your actual book — in about a minute
The KDP Visibility Kit reads your finished manuscript, checks live Amazon search demand, and returns your 7 slots filled with demand-ranked phrases (plus 3 discovery extras), a description written to rank and sell, and 3 category picks. No spreadsheet, no guessing.
Get your 7 keywords + description — $14.99Common questions
How many keywords does Amazon KDP allow?
Exactly 7 backend keyword slots per book, each up to 50 characters. You can edit them any time in KDP, and changes re-index within a few days.
What makes a good KDP keyword?
A phrase that is both genuinely searched by readers and genuinely accurate to your book. Specific multi-word phrases (long-tail) usually convert better and are easier to rank for than single broad words.
Do keywords in my book description matter too?
Yes. Amazon indexes your description, so the phrases woven into it reinforce your 7 backend slots. The description has to sell to the reader and carry search phrases at the same time.
Published 2026-07-07. Related: Why can't I find my book on Amazon? · KDP Visibility Kit