Why irrelevant keywords never convert 
Amazon PPC is not just bidding — it’s matching the right audience with the right product.
If your keyword is not relevant to your listing, Amazon will show your ad less AND your clicks will never turn into sales.
Low relevancy keywords cause:
High CPC
Low click-through rate
Zero conversions
Wasted spend
High ACOS
High relevancy keywords give:
Cheaper CPC
Better conversions
Stronger ranking
Higher organic visibility
Rule:
If a keyword doesn’t naturally fit your title, bullets, images, or customer intent — it will NEVER convert, even if the search volume is huge.
Focus on high-intent, product-matching, buyer-mindset keywords.