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AI-powered keyword research with built-in compliance checking for Amazon KDP
Keywords are the foundation of book discoverability on Amazon. When readers search for books, Amazon's algorithm matches their search terms with the keywords in your book's metadata. Choosing the right keywords can mean the difference between obscurity and bestseller status.
How Amazon Keywords Work: Amazon allows you to enter 7 keyword phrases (up to 50 characters each) in your KDP dashboard. These keywords don't appear publicly but are indexed by Amazon's search algorithm. Combined with your title, subtitle, and description, they determine when your book appears in search results.
Why Keywords Matter: 90% of book sales on Amazon come from search. If your book doesn't appear in search results for relevant queries, potential readers will never find it. Strategic keyword selection is the most cost-effective way to increase visibility without paid advertising. For a deep dive into keyword strategy, read our comprehensive keyword research guide, and always check for banned keywords before publishing.
Not all keywords are created equal. Understanding the difference between short-tail and long-tail keywords is crucial for your KDP success:
1-2 words, broad topics
⚠️ Avoid: Too competitive for new authors
3-5+ words, specific phrases
✨ Recommended: Higher chance of ranking and sales
💡 Pro Strategy
Use 5-6 long-tail keywords and 1-2 medium-tail keywords. Long-tail keywords bring qualified buyers who know exactly what they want. A book ranking #1 for "cozy mystery cat sleuth small town" will outsell a book ranking #5,000 for "mystery".
Follow this proven strategy to find keywords that actually drive sales:
Start with 10-15 broad topics related to your book. For a cozy mystery: "cozy mystery", "amateur sleuth", "small town mystery", "cat detective", "bakery mystery". These are your starting points, not your final keywords.
Use our AI tool to generate 20 variations. Then check Amazon's search bar autocomplete - type your seed keyword and see what Amazon suggests. These suggestions are based on real user searches and are goldmines for long-tail keywords.
Search each keyword on Amazon. If the first page shows books with BSR under #10,000, competition is high. If you see BSR #50,000-#200,000, that's your sweet spot. You want keywords where you can realistically rank on page 1.
Run every keyword through our Compliance Checker. Remove any banned terms (trademarked words, inappropriate content, false claims). Select your final 7 keywords - prioritize long-tail phrases with buyer intent and manageable competition.
⚡ Quick Win
Look at the "Customers who bought this item also bought" section on competing books. The keywords that work for similar books will likely work for yours. This is reverse-engineering success.
These common mistakes can tank your book's visibility or even get your account suspended:
Never use "Amazon", "Kindle", "KDP", or brand names like "Harry Potter" or "Game of Thrones". Instant account suspension. Use generic alternatives: "wizard school fantasy" instead of "Harry Potter style".
Don't repeat the same keyword multiple times or use unrelated keywords. "romance romance love story romance novel" doesn't work. Amazon's algorithm is smart enough to penalize this.
Your keywords must accurately describe your book. A romance novel shouldn't use "thriller" or "cookbook" keywords. Amazon tracks click-through and conversion rates - irrelevant keywords hurt your ranking.
Each keyword phrase can be up to 50 characters. "cozy mystery small town amateur sleuth with cat detective solving crimes" is 73 characters - Amazon will truncate it. Keep phrases under 50 characters.
Don't waste keyword slots on words already in your title or subtitle. If your title is "Murder in the Bakery: A Cozy Mystery", don't use "murder bakery cozy mystery" as a keyword. Amazon already indexes those words.
"romance", "fiction", "books" are too competitive. You'll never rank. Focus on 3-5 word long-tail keywords where you can actually reach page 1. "small town second chance romance" beats "romance" every time.
Keywords aren't permanent. Test different combinations every 2-3 months. Track which keywords drive sales (check your Amazon Ads reports even if you're not running ads). Replace underperforming keywords with new ones.
✅ The Right Way
Use 7 unique, relevant, compliant long-tail keywords that accurately describe your book's content, genre, and target audience. Test and optimize every quarter based on performance data.
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