The Buy Box is the most important position for any seller on Amazon! The Buy Box refers to the yellow “Add to Cart” box on the right side of the Amazon product detail page. When a seller ‘wins’ the Buy Box, they get the primary position to earn that sale. This means seller’s who own the Buy Box obtain almost every sale on that listing. This is very valuable real estate to have because over 80% of all Amazon sales go through the Buy Box.