Amazon Sales Rank, also known as the Best Sellers Rank (BSR), is a numerical indicator of how well a product is selling on Amazon within its specific category. A lower sales rank (such as 1, 2, 3) indicates that the product is selling better than products with higher ranks in the same category, while a higher rank (such as 10, 11, 12) suggests slower sales. In other words, it is simply a measure of a product’s popularity and rank in listings compared to others in its category.