In the realm of Amazon affiliate marketing, how can Ahrefs serve as a powerful asset for marketers aiming to boost their strategies? What are the key features of Ahrefs that can help in optimizing marketing efforts, tracking performance metrics, and driving higher conversions? Moreover, how does Ahrefs compare to other SEO and marketing tools in the specific context of Amazon affiliate marketing—what unique advantages or potential limitations should marketers be aware of when choosing Ahrefs for their campaigns?