For a Book, How Important Are Keywords and Key Phrases?
- schlesadv
- Mar 10
- 2 min read
1. Keywords Control Discoverability 🔎
Amazon’s search engine (called A9/A10) uses your keywords to decide when your book appears in search results.
For example:
If someone searches “Civil War historical novel”
Amazon will show books whose:
Title
Subtitle
Description
Backend keywords
Categories contain those words.
If your listing doesn’t contain those phrases, Amazon may never show your book to that reader.
2. Long-Tail Key Phrases Work Best
Single words are too competitive. Specific phrases convert better.
Example:
Weak keywords:
mystery
romance
thriller
Better keywords:
“small town murder mystery”
“clean historical romance”
“psychological thriller with female detective”
These match how real readers search.
3. Keywords Help Amazon Recommend Your Book
Amazon also uses keywords to decide:
“Customers Also Bought”
Recommended for you
Category placement
If your keywords clearly define the genre and audience, Amazon’s algorithm can market the book for you.
4. They Influence Category Rankings
The keywords you enter in can help Amazon place your book in additional hidden categories, which can make it easier to become a #1 bestseller in a niche category.
5. Keywords Affect Ad Performance
If you run ads through Amazon ads:
Amazon uses your listing keywords to determine relevance
Good keyword alignment lowers ad cost per click and improves visibility.
âś…Â Rough Importance in an Amazon book listing
Typical impact on sales/discovery:
Cover design:Â Very high
Reviews:Â Very high
Keywords/phrases:Â Very high
Categories:Â High
Description: Moderate–high
Bad keywords can mean a great book never gets found.
A Tip Most Authors Miss
Amazon gives 7 backend keyword fields (50 characters each)Â
Best practice:
Use phrases, not single words
Don’t repeat words already in the title
Avoid commas
Think like a reader searching, not an author describing.
Example backend keyword line:
Publishing exceptional books in all genres since 2008
Keywords are honestly one of the most underrated parts of getting a book noticed.
Amazon does not guess what your book is about. It matches your title, subtitle, description, and backend keywords against what readers actually type in. No match, no visibility.
This is worth sorting out early, especially when working with book publishing services UKÂ authors trust. Get the keywords right before your listing goes live, not after sales disappoint.