How to Find High-Opportunity Keywords
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Why Keywords Matter for KDP Books
When someone searches Amazon for "sourdough bread cookbook," Amazon decides which books to show based largely on whether those words appear in the book's title, subtitle, description, and backend keywords. If you're not using the right keywords, you're invisible — even if your book is exactly what the reader is looking for.
The challenge is knowing which keywords are worth targeting. You want phrases that:
- Enough people are actually searching for (Search Volume)
- Don't already have dozens of strong, well-reviewed books dominating the results (Competition)
- Give you a realistic shot at getting discovered (Opportunity)
Keyword Research in PublishRank finds those phrases for you.
How Keyword Research Works in PublishRank
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Enter a seed keyword — your book's core topic. For example: "homesteading," "sourdough bread," "watercolor painting," "cozy mystery."
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Click Research Keywords
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PublishRank analyzes up to 10 keyword variations related to your seed term, pulling real data from Amazon search patterns
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Each keyword is scored across 3 dimensions, shown with a 0–100 score and a Low / Medium / High badge
Understanding the 3 Scores
Opportunity Score
How much room exists to rank for this keyword. A High Opportunity score means the keyword is underserved — few strong books currently rank for it, or the ones that do have weaknesses you can exploit. Higher is better. This is often the most important score to look at.
Competition Score
How many strong, well-reviewed books are already ranking for this keyword. A High Competition score means the field is crowded with established books. If your book is new with few reviews, high-competition keywords may not be worth targeting yet — you'll struggle to break into the top results. Focus on Medium competition keywords first and build your review base before attacking high-competition terms.
Search Volume Score
How many Amazon shoppers are actually searching this phrase. A High Search Volume score means lots of potential readers are typing this into Amazon. The golden target is a keyword with High Search Volume + Low or Medium Competition — plenty of buyers, but not too many strong competitors standing in the way.
Reading the Results Table
Your results appear in the Recent Searches table, which shows each keyword alongside its three scores and the date it was last researched. You can:
- Click Re-run on any previous search to get fresh, updated scores
- Click View Full History to compare all your past research in one place
🎯 Ideal combination to look for:
High Opportunity + Low or Medium Competition + High Search Volume = a keyword worth targeting immediately.
Where to Use Your Keywords
Once you've found your best keywords, here's where each one should go:
Title
Include your single most important keyword naturally in the title. Don't force it — if it sounds awkward, it'll hurt your click-through rate.
Subtitle
Work in a secondary keyword phrase. The subtitle is fully indexed by Amazon and gives you extra keyword real estate without affecting how the title reads.
Description
Use keyword phrases naturally throughout — don't stuff. The description is indexed for search and it's also read by humans, so it needs to be compelling writing first.
Backend Keywords (KDP Bookshelf)
7 fields in your KDP Bookshelf, each up to 50 characters. Use these for variations, long-tail phrases, and alternate phrasings that didn't fit in your title or description. No repetition — Amazon ignores duplicate words it already indexes from your title and description.
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