https://www.smartscout.com/amazon-ppc-competitor-research-adspy
AdSpy: Amazon PPC Competitor Research | SmartScout
AdSpy enables you to uncover the metrics behind all of your competitors' paid search terms and discover the best keywords to target within your own Amazon PPC...
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https://www.spyfu.com/
SpyFu - Competitor Keyword Research Tools for Google Ads PPC & SEO
Search for a competitor. See their PPC and SEO secrets, download their best keywords, get the backlinks that drive their rankings, and laugh at their mistakes.
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