Amazon keyword research: intent before volume
Amazon search is buying search — every query is a wallet asking a question. The seven keyword slots reward phrases a buyer would type, not synonyms stacked to the character limit. Mine them from three places: autocomplete on your topic, the titles and subtitles of the current bestsellers in your niche, and the vocabulary in their reviews, where readers describe the problem in their own words.
Volume without fit is a trap: ranking for a broad term in front of the wrong readers produces clicks, returns and a sagging conversion rate the algorithm reads as irrelevance.