Begin with competitive bids based on your profit margins and competition. Use Amazon’s suggested bid range as a starting point. Adjust bids based on campaign performance, increasing bids for high-converting keywords and decreasing or pausing underperformers. Consider using manual bidding to have more control, and routinely optimize bids to maximize ROI. https://bizistech.com/maximize-your-amazon-sales-with-amazon-sponsored-product-management-and-manage-amazon-product-ads/