Keywords are an important part of discoverability for anyone selling goods on Amazon. In authors’ cases, they help drive readers to books. With all the lovely (yes, that is sarcasm) algorithms Amazon has in place that makes it nearly impossible to get noticed, it is crucial to optimize the SEO for every book authors publish. One way to do that is to plan the best keywords to use for your metadata, book description, and more.
Try Google Keyword Planner to “refine search campaigns and ensure content remains relevant”. Come up with a bunch of words that would describe the main points or theme of your book (or other product you are selling) to plug into the planner and retrieve the keywords that garner the most search relevance.
Sounds like a winner.