The amazon Buy Box is typically displayed for products that are sold by multiple sellers on Amazon, including both Amazon itself and third-party sellers. The Buy Box algorithm selects a single seller to display in the Buy Box based on a variety of factors, such as price, shipping speed, seller rating, and inventory levels.

When a customer clicks the "Add to Cart" or "Buy Now" button on the product detail page, the seller displayed in the Buy Box is the one that receives the sale. Winning the Buy Box can be crucial for sellers looking to increase their sales and visibility on Amazon, as the majority of sales on the platform are made through the Buy Box.

Sellers can improve their chances of winning the Buy Box by optimizing their product listings, offering competitive pricing, maintaining high seller ratings, and ensuring fast and reliable shipping. However, the Buy Box algorithm is complex and takes into account many different factors, so winning the Buy Box is not guaranteed and can change frequently based on changes in seller performance and market conditions.