Amazon Keywords & Categories for Authors: Boost Your Book’s Visibility

How Amazon Uses Keywords and Categories

Amazon wants to show shoppers books they’re likely to buy. Keywords and categories help Amazon understand what your book is about and who it’s for.

• Keywords tell Amazon which search phrases your book should show up for.
• Categories determine which “shelves” your book sits on and which bestseller lists you can rank in.

Done well, they make it easier for the right readers to find you without constant ads.

Step 1: Brainstorm Reader-Focused Keyword Ideas

Start by thinking like a reader, not a marketer. Ask, “What would someone type into Amazon if they wanted a book like mine?”

• List 20–30 phrases that describe your topic, promise, and audience.
• Include problems (“overcome writer’s block”), outcomes (“write a novel in 30 days”), and identities (“busy moms”).
• Look at similar books and notice which words appear in their titles, subtitles, and descriptions.

Use your favorite research tools from The Best Tools for Authors if you want extra data, but don’t overcomplicate it.

Step 2: Validate Keywords on Amazon

Now check how readers are actually searching:

• Type your phrases into the Amazon search bar and note the autocomplete suggestions.
• Click through to see the top 10–20 books for each phrase.
• Ask: “Does my book genuinely belong here?” If yes, keep the keyword.

You’re looking for phrases with clear buying intent and books that are similar enough that you’d be a good alternative.

Step 3: Choose and Structure Your 7 KDP Keyword Slots

KDP gives you seven keyword fields. You don’t need to repeat words from your title or category; use the space for extra reach.

• Use short phrases rather than single words: “self publishing for beginners”, “cozy mystery series”.
• Avoid keyword stuffing; keep phrases readable and focused.
• Include a mix of broad phrases and more specific, “long tail” searches.

Remember, your book page (title, subtitle, description) and your interior still matter. Make sure your content matches what the keywords promise.

Step 4: Pick Smart, Winnable Categories

Categories are not just labels; they’re potential bestseller lists. You want categories that:

• Accurately reflect your book’s topic and genre.
• Are not so broad that you’re buried instantly.
• Are active enough that ranking actually means something.

Browse similar books, scroll to “Product Details,” and note which categories they appear in. Capture 5–10 options you’d also fit.

Step 5: Monitor and Adjust Over Time

Keywords and categories are not “set it and forget it.” After launch:

• Track which search phrases or categories seem to drive sales or page reads.
• Experiment with one or two keyword changes at a time.
• Consider requesting category changes via KDP support if you find better fits.

Treat this like ongoing optimization, just like pricing or cover design.

Where This Fits in Your Publishing Plan

Dialing in keywords and categories works best after your manuscript is fully formatted and ready to upload. If you’re not there yet, start with How to Format a Book for KDP , then come back to this checklist as you finalize your KDP setup.