How Many Keywords Should You Use in Amazon KDP
One of the most common questions from KDP authors is: how many keywords should I actually use? Amazon gives you 7 keyword fields in KDP, each allowing up to 50 characters. But knowing how many to use — and how to use them effectively — requires understanding how Amazon's search algorithm works. This guide gives you a clear, actionable answer.
1
Amazon KDP provides 7 keyword fields in your book's metadata, and you should use every single one. Each field accepts up to 50 characters, giving you a total of 350 characters of keyword space. Leaving any field blank is a missed opportunity to appear in more search results. Think of each field as a separate signal you are sending to Amazon's algorithm about what your book is about and who should find it.
2
Single-word keywords are almost always too broad and too competitive to rank for. Instead, focus on keyword phrases of 2–5 words that reflect specific reader intent. For example, instead of 'business', use 'small business marketing guide' or 'business book for entrepreneurs'. Phrase-based keywords are more targeted, face less competition, and attract readers who are more likely to purchase your book.
3
Amazon's algorithm already indexes the words in your title, subtitle, and series name. Repeating these words in your keyword fields wastes valuable space. Use your 7 keyword fields to introduce entirely new search terms that are not already present in your title metadata. This maximizes the total number of unique search queries your book can appear for.
4
Amazon prohibits certain types of keywords, including competitor author names, claims like 'bestseller' or '#1', and misleading terms. Beyond prohibited terms, avoid generic words like 'book', 'novel', or 'read' — Amazon already knows your listing is a book. Focus exclusively on terms that describe your content, audience, or the specific problem your book solves.
5
Keyword performance changes over time as trends shift and competition evolves. Review and update your KDP keywords every 30 to 60 days based on your sales data and ranking performance. If a keyword is not driving traffic or sales, replace it with a new candidate. Tools like KDP Title Pro make it easy to identify underperforming keywords and discover fresh alternatives to test.
Key Takeaways
The answer to how many keywords to use in Amazon KDP is simple: use all 7 fields, every time. But the real skill lies in choosing the right phrases, avoiding wasted repetition, and refreshing your keywords regularly. Master these principles and your book will consistently appear in front of the right readers.
Continue Learning
Explore more resources to boost your book marketing success:
Ready to Optimize Your Book?
Use our AI tool to generate professional SEO content in seconds
Try Free ToolAbout KDP Title Pro Team
KDP Title Pro Team is a book marketing specialist with over 10 years of experience helping authors succeed on Amazon KDP. Passionate about data-driven strategies and author empowerment, KDP shares actionable insights to help writers reach more readers and increase book sales.
Share this article
Related Articles
Continue your learning journey with these recommended reads
How to Find Hidden Keywords for Amazon KDP Books
Discover powerful hidden keyword strategies that most KDP authors overlook — and learn how to use them to boost your book's visibility on Amazon.
How to Discover Amazon Book Keywords Using Search Suggestions
Amazon's search suggestion feature is one of the most powerful — and free — keyword research tools available to KDP authors. Here's how to use it like a pro.
The Best Way to Test Amazon KDP Keywords Before Publishing
Publishing with untested keywords is a gamble. Learn the proven methods to validate your Amazon KDP keywords before your book goes live — and maximize your launch results.