Amazon's algorithm refers to the complex set of mathematical formulas and rules that the company uses to determine the ranking of products in its search results and product recommendations. The algorithm takes into account factors such as relevance, popularity, sales history, price, and many other variables, and is constantly being updated and refined by Amazon to provide the best possible shopping experience for its customers. The Amazon algorithm is crucial to the success of sellers on the platform, as it directly affects visibility, sales, and profits.