Buy Box
Category: Marketplace
Also searched as: Buy Box
Definition (plain English)
The prominent marketplace purchase position, especially on Amazon, where one seller offer is selected as the default add-to-cart option.
Why it matters commercially
Buy Box eligibility affects marketplace sales velocity, ad efficiency, stock planning, and whether a seller can recover landed cost after fees and fulfillment.
Example
A distributor lost the Buy Box after a competitor undercut price and offered faster fulfillment, so the team recalculated margin before matching the price.
Common mistake
Chasing Buy Box share without checking contribution margin after marketplace fees, FBA or fulfillment cost, returns, PPC spend, and repricing risk.
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