I've always been a bit of a keyword nerd But I still think good old Google Keyword Planner is the best place to start. It does leave out a lot of Kw's though, whether intentionally or not Merchantwords.com is awesome for Amazon, it's not 100% accurate but gives a broad overview of a niche. Keywordtool.io is my new favourite - gives a huge list of autosuggested Keywords - often finds all the ones that Google Keywod Tool misses.
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But I still think good old Google Keyword Planner is the best place to start. It does leave out a lot of Kw's though, whether intentionally or not
Merchantwords.com is awesome for Amazon, it's not 100% accurate but gives a broad overview of a niche.
Keywordtool.io is my new favourite - gives a huge list of autosuggested Keywords - often finds all the ones that Google Keywod Tool misses.