When you publish on Amazon Kindle, your book’s visibility depends heavily on keywords and categories. Get them right, and the right readers find you more easily. Get them wrong, and your book may languish undiscovered. Below is a practical guide to selecting the best search terms and subcategories so your book gains traction in Amazon’s massive storefront.
1. Why Keywords and Categories Matter
- Discoverability: Amazon’s algorithm matches potential buyers’ search queries (keywords) to books with relevant terms.
- Genre Clarity: Categories help readers find you in the correct genre sections—vital if you’re writing in popular niches like romance or thriller.
- Bestseller Lists: A well-chosen subcategory can increase your odds of hitting a bestseller badge if your book performs well.
Pro Tip: Keywords + categories = a powerful combination. Don’t rely solely on one or the other. Aim to fine-tune both.
2. Understanding Keywords
a) Amazon vs. Google Keywords
- Amazon Keywords: Reflect the specific queries shoppers type when browsing. They might search “small-town cozy mystery,” “clean urban fantasy,” or “time travel romance.”
- Google Keywords: People often use broader phrases. These can still be relevant if your audience might discover your book outside Amazon.
Your focus is primarily on Amazon’s user search patterns—though some overlap exists.
b) Basic vs. Long-Tail Keywords
- Basic: Short, general terms like “vampire romance” or “weight loss.” Very competitive, making it tougher to rank high.
- Long-Tail: More specific strings—“vampire romance set in Victorian London” or “weight loss tips for busy moms.” Typically lower competition, more targeted audience.
Long-tail phrases often convert better because they reflect a clear, specific reader need or interest.
3. Brainstorming Potential Keywords
- Look at Similar Top Books: Type a relevant genre or subgenre in Amazon’s search bar. Observe the suggestions Amazon auto-populates—these are popular search terms.
- Check Bestsellers: Study the keywords used in top titles’ blurbs or editorial reviews. This can hint at what resonates with your audience.
- Author Central / ADS: If you run Amazon ads, the “Suggested Keywords” can reveal terms Amazon thinks match your book.
- Reader Q&A: Reddit or Goodreads can show how readers talk about the genre—use their language as potential search terms.
Pro Tip: List 10–20 promising keywords or phrases, then narrow down to the most relevant for your book’s theme.
4. Evaluating Keyword Viability
a) Search Volume vs. Competition
- Check Amazon Search: Type each prospective keyword. See how many results appear. If it’s 10,000+ results, that might be very competitive. If only a few hundred, it might be too niche or possibly perfect if you see evidence of decent demand.
- Look at the Top Sellers: If the top titles for that keyword rank high (under 10k in the Kindle Store), it’s likely an active keyword. But high competition means you need a strong cover, blurb, and reviews to stand out.
b) Relevance Over Hype
A big mistake is picking popular keywords that don’t truly fit your book. Misleading keywords can result in negative reviews or confused readers. Always prioritize accuracy—like “sweet small-town romance” is accurate if that’s exactly what you deliver.
5. Implementing Kindle Keywords
When publishing your Kindle eBook, KDP allows up to 7 keyword slots:
- Combine Phrases: Each slot can include multiple words. Instead of “romance” in one slot and “small town” in another, you might do “small town romance series.”
- Plural Forms: Don’t repeat “romance novel” and “romance novels.” Amazon’s algorithm accounts for basic variations.
- Don’t Include:
- Competitor titles or author names (against Amazon policy).
- Overly broad or irrelevant terms like “free,” “best.”
- Offensive or misleading words.
Pro Tip: You can update keywords anytime in KDP, so if some fail to yield results, tweak them after a few weeks.
6. Choosing the Right Categories
a) Main vs. Subcategories
- Main Categories: Broad groupings like “Fiction > Mystery & Thrillers,” “Nonfiction > Self-Help.”
- Subcategories: More specific sections, e.g. “Fiction > Mystery & Thrillers > Police Procedurals” or “Self-Help > Motivational.”
You can pick 2 main categories directly in KDP, but there are hundreds of hidden subcategories. Sometimes you must email KDP Support to request a subcategory not listed in the setup menu.
b) Category Strategy
- Accuracy: Always reflect your book’s content. Putting your romance novel in “Sea Stories” to reduce competition might confuse readers.
- Competition Size: Subcategories with fewer books can mean easier ranking. If it still fits your content well, that might yield a “Bestseller” badge.
- Reader Expectation: If you select “Urban Fantasy” but your story is epic fantasy with medieval settings, you’ll likely get negative reviews from disappointed fans.
Tip: Test a couple of subcategories. If your ranking is solid or your sales are in a particular niche, try to get placed there via Amazon Support.
7. Researching Categories
Amazon Best Sellers page can show you:
- Categories & Subcategories: Expand “See Top 100 in Kindle eBooks” to find smaller niches.
- Top Books: If the top 20 in a subcategory have strong sales ranks (like #1,000 in Kindle store), that category is quite competitive. If they’re around #100k or #200k, it’s a smaller niche.
- Crossover Categories: Some authors target categories in a different but related genre, e.g., “Romance > Paranormal” + “Fantasy > Dragons & Mythical Creatures.”
8. After Publication: Adjusting Keywords & Categories
- Monitor Sales: If you see minimal or no traction after a few weeks, re-examine your chosen terms. Perhaps they’re too generic or not truly relevant.
- Solicit Reader Feedback: Ask your audience if they discovered your book via a certain keyword. If not, you may pivot your approach.
- Test or Switch Subcategories: Email KDP Support with your ASIN, request a subcategory change. You can do this if you realize another sub-niche fits better.
Pro Tip: Amazon updates can take a few days, so check results after changes have had time to propagate.
9. Combining Keywords with Categories: A Winning Recipe
- Put core genre phrases in your keywords. (e.g., “steamy Regency romance,” “cozy cat mystery,” “diet plan for busy moms”)
- Pick categories that exactly match your subgenre or niche.
- This reinforces Amazon’s algorithm that your book belongs in, say, “Fiction > Romance > Regency” or “Nonfiction > Health & Fitness > Diet & Nutrition.”
A consistent message (title, subtitle, cover, keywords, categories) helps Amazon confidently recommend your book to the right readers.
Final Thoughts
Choosing effective keywords and categories is an essential piece of your overall book marketing puzzle. By researching competitor titles, targeting relevant search terms, and placing your book in accurate, not overly broad subcategories, you boost your chances of discovery. Amazon’s catalog is vast, but the right metadata ensures the readers who will love your book can actually find it. Don’t be afraid to experiment with new keywords or subcategories if initial results underwhelm—fine-tuning is normal. Over time, you’ll zero in on the sweet spot where your book ranks well, meets eager readers, and gains healthy sales momentum.