Metadata SEO Booster
7 Backend Optimizer
Pack your 7 keyword slots properly to rank for more search terms while avoiding duplicates.
KDP Slots
Slot 10/50 chars
Slot 20/50 chars
Slot 30/50 chars
Slot 40/50 chars
Slot 50/50 chars
Slot 60/50 chars
Slot 70/50 chars
Frequently Asked Questions
What are 'Backend Keywords'?
These are the 7 hidden keyword slots in your KDP dashboard setup. Customers don't see them, but Amazon's search algorithm uses them to rank your book.
How many characters per slot?
Amazon allows 50 characters per slot (including spaces). This tool helps you maximize every single character to get more traffic.
Do punctuation and spaces count?
Yes. Don't waste space on commas or 'and'. Just use spaces to separate words. For example: 'mystery thriller suspense' is better than 'mystery, thriller, and suspense'.
Should I repeat my title keywords?
No! Amazon already indexes your Title and Subtitle. Using backend slots for the same words is a waste of space. Use synonyms and related questions instead.