What is the Amazon Buy Box?

Excuse me, could you elaborate on the concept of the Amazon Buy Box? I'm somewhat familiar with Amazon as an e-commerce platform, but I'm curious about how the Buy Box specifically works. Does it have any implications for sellers looking to promote their products on Amazon? Is there a way to secure or maintain the Buy Box for one's listings, and if so, what factors are considered in the process? Your insights would be greatly appreciated.