Amazon & Walmart Seller Glossary

A+ Content

Amazon's enhanced product-description format for Brand Registry members, allowing richer images and layout on the listing page beyond standard bullet points.

ACoS

Advertising Cost of Sale — ad spend divided by ad-attributed sales.

ASIN

Amazon Standard Identification Number — Amazon's unique product identifier.

Brand Registry

Amazon's program giving verified brand owners tools for IP protection, A+ Content, and brand controls.

BSR

Best Seller Rank — Amazon's category sales-velocity ranking.

Buy Box

The default "Add to Cart" offer on a shared listing, awarded based on price, fulfillment, and seller performance.

FBA

Fulfillment by Amazon — Amazon stores, picks, packs, and ships the product on the seller's behalf.

FBM

Fulfilled by Merchant — the seller handles their own storage and shipping instead of using FBA.

POA (Plan of Action)

The written explanation and corrective-action plan a suspended seller submits to Amazon to request account reinstatement.

ROAS

Return on Ad Spend — the inverse view of ACoS, measuring sales generated per dollar of ad spend.

Seller Scorecard

Walmart's account health metric tracking shipping and defect performance.

TACoS

Total Advertising Cost of Sale — ad spend divided by total sales (ad + organic); a better long-term profitability measure than ACoS alone.

Walmart Connect

Walmart's advertising platform for sponsored product and brand campaigns.

WFS

Walmart Fulfillment Services — Walmart's equivalent to Amazon FBA.