Walmart Seller Glossary
Plain-English definitions of the acronyms, programs, and concepts you'll see across the Walmart Marketplace. Curated by a Walmart-native team — every entry written by someone who has actually shipped on the platform.
1P vs 3P
1P = Walmart itself sells the item (you sold to Walmart wholesale). 3P = you sell directly to the consumer on the Walmart Marketplace.
Additional Offer Count
The number of OTHER sellers competing on the same Walmart listing (excluding the Buy-Box winner).
Agency Mode
Multi-tenant workspace for agencies managing 5+ Walmart-seller clients. Each client appears as a separate workspace with white-label reports.
AI Listing Rewriter
ShelfSEO's Claude-Sonnet-backed rewriter that generates Walmart-format-compliant titles + descriptions + key features, with optional brand-voice profile applied.
Algorithm Shift
An unannounced change in Walmart's SERP-ranking model that moves rank positions across many listings simultaneously.
API Key (ShelfSEO)
Bearer token for the ShelfSEO Public API — issued per user, rate-limited per key, Pro+ tier required.
Attribute Completeness
Percentage of required + recommended product attributes you've filled in — the single highest-weighted Listing Quality Score component.
Barcode Scanner (ShelfSEO)
Web (BarcodeDetector API) + native (ML Kit via Capacitor) scanner that resolves a UPC/EAN/GTIN into the matching Walmart listing for instant audit.
Brand Voice Profile
Saved tone + style settings that get applied to every AI rewrite — keeps a 1000-SKU catalog sounding like one consistent brand.
Buy Box (Featured Offer)
The prime sales position on a Walmart product page that captures the Add-to-Cart click. Losing it typically means losing 80%+ of the listing's sales.
Buy Box Suppression
Walmart removes the Add-to-Cart button entirely — usually because the listing's price is materially higher than the price-match crawler's reference.
Buy-Box Detection
Parsing the Walmart product-page HTML / JSON to determine whether a Buy Box is active, who's winning it, and how many other sellers compete.
Buy-Box Lost Alert
Email + Slack alert ShelfSEO fires when a tracked listing transitions from has_buy_box=true to false between snapshots.
Buy-Box Rotation
When Walmart cycles the Buy-Box winner among multiple sellers within a day to balance traffic — distinct from a single seller winning + losing.
Buy-Box Share
Percentage of time you held the Buy Box on a contested listing over a rolling window — the closed-loop metric for repricing effectiveness.
Category Suppression
Walmart hides a listing from category-browse pages (but not from direct-keyword search) when it fails category-specific compliance rules.
CPSIA (Children's Product Safety)
Consumer Product Safety Improvement Act — federal law requiring lead-content testing + tracking labels on every product for children ≤12.
CRON_SECRET
Bearer-token env var that gates every ShelfSEO cron route — without it set, the cron loop never authenticates and returns 503 perpetually.
Cross-Platform Demand
Estimated monthly search volume for a keyword across Walmart, Amazon, and Google — used to decide where to invest listing-rank effort.
EAN (European Article Number)
13-digit GTIN format — the standard barcode shape outside North America.
Encrypted Credentials
Walmart Marketplace + Connect client secrets are stored encrypted at rest using AES-256-GCM with a master key from SECRET_ENCRYPTION_KEY.
Feed Poll
The process of checking a previously-submitted Walmart feed's processing status — required because MP_ITEM is asynchronous.
GTIN (Global Trade Item Number)
The universal product identifier — UPC (12 digits), EAN (13), or ISBN — Walmart requires on every catalog listing.
Hazmat Classification
Hazardous-materials classification required for items containing lithium batteries, aerosols, flammables, or pressurized contents.
Index Check
Verifies Walmart's search index includes your listing for the keywords you target — surfaces the silent suppression case.
Keyword Research (Walmart)
The process of finding high-volume, low-competition Walmart search terms to target with new listings or rank-tracker entries.
Listing Quality Score (LQS)
Walmart's internal 0-100 score grading how well a listing is built — drives search rank, Buy-Box eligibility, and category-filter inclusion.
Listing Snapshot
A point-in-time record of a Walmart listing's full state — title, description, attributes, images, price, reviews, Buy-Box, rank.
LQS Attributes Sub-score (40% weight)
The single highest-leverage component of Walmart's Listing Quality Score — measures how completely you've filled the per-category attribute schema.
LQS Content Sub-score (20% weight)
Title format compliance + key-features completeness + description length + keyword density.
LQS Images Sub-score (20% weight)
Image count + resolution + composition grading. Drives a 20% slice of the LQS aggregate.
MAP (Minimum Advertised Price)
The lowest price a brand allows its authorized resellers to advertise — enforced by the brand, not Walmart.
Mobile vs Desktop Rank Tracking
Per-keyword opt-in to track Walmart's distinct mobile SERP — different UA, different ordering, sometimes different organic top-10.
MP_ITEM Feed
Walmart's primary catalog-update feed type — partial item updates use processMode=REPLACE_AND_ADD so unspecified fields are preserved.
Negative Keyword
Walmart Connect ads setting that prevents your ad from showing on a specific query — used to stop spending on queries that never convert.
Niche Finder
ShelfSEO's two-mode opportunity scorer: ranks products (where to compete on existing SKUs) and keywords (where to launch new listings).
Onboarding Email Cadence
Four lifecycle emails keyed off signup time: welcome (day 0), day-3 check-in, mid-trial (day 7), trial-end (day 14).
Order Defect Rate (ODR)
Percentage of orders that resulted in a negative outcome: refund, cancellation by seller, return, A-to-z claim equivalent.
Organic Search Rank
Position of your listing in Walmart's non-sponsored search results — 1 is best, null means not in the top 100.
People Also Asked (Walmart SERP)
The buyer-question widget Walmart renders on category SERPs — direct input for listing FAQ + description copy.
Popular SKU Discovery
Cross-customer pipeline that pre-tracks the top 100 listings per category seed — gives sellers backfilled history when they start tracking a popular SKU.
PPC Waste Analyzer
ShelfSEO's analysis of your Walmart Connect Search Term Report — auto-flags negative-keyword candidates (high spend, zero sales).
Price Drop Alert
ShelfSEO alert that fires when a tracked listing's price drops by ≥5% (warn) or ≥15% (alert) between snapshots.
Pricing Parity
Walmart's requirement that your Walmart price not be materially higher than the same product on Amazon, Target, BestBuy, Costco, or your own DTC site.
Pro Seller Badge
Trust badge Walmart awards to sellers maintaining a 90+ Seller Score. Lifts Buy Box win rate by 10-20% and CTR by 10%.
Rank Drop Alert
ShelfSEO alert that fires when a tracked keyword drops by ≥4 positions (warn) or ≥10 positions (alert) in a single day.
Rank Tracker
Daily monitoring of your listings' rank for a chosen set of keywords — included on the Pro tier (from $9.99/mo).
Rank-to-Listing-Change Correlation
ShelfSEO's analysis that joins audit-detected listing edits with rank movements on tracked keywords within ±3 days — surfaces which edits actually moved positions.
Referral Fee
Walmart's percentage cut of every sale — analogous to Amazon's category referral fee. Charged on item subtotal, not on shipping.
Repricing
Automated adjustment of your Walmart listing price in response to Buy-Box state, competing offers, or pricing-parity violations.
Reverse Listing Lookup
Paste a competitor's Walmart URL → ShelfSEO returns every keyword that listing currently ranks for in the top 100.
Review Velocity
The rate at which a listing accumulates reviews — Walmart treats steady velocity as a strong organic-ranking signal.
Sales Velocity
Real unit-sales-per-day for a listing — only available via the Walmart Marketplace API /orders endpoint.
Search Term Report
Walmart Connect CSV report showing which actual customer queries triggered your sponsored ads — surfaces wasted ad spend.
SECRET_ENCRYPTION_KEY
32-byte base64 env var ShelfSEO uses to envelope-encrypt third-party API secrets (Walmart Marketplace + Connect client secrets) at rest.
Seller Score
Composite 0-100 score Walmart calculates per seller — drives Pro Seller badge eligibility, suspension risk, and tier-2 program access.
SERP Volatility
Day-over-day rank-position movement across your tracked keywords — the input signal to algorithm-shift detection.
ShelfSEO Agency Tier
$99.99/mo — for agencies and power sellers managing multiple Walmart accounts. Multi-tenant client mode, white-label PDF reports, public API (read + write), 10 user seats.
ShelfSEO Audit Engine
The pure-function scoring engine that grades a Walmart listing 0-100 across the 5 LQS sub-scores plus Buy-Box + compliance findings.
ShelfSEO Chrome Extension
Browser extension that overlays ShelfSEO scores + Buy-Box state + price history on any Walmart product page you visit.
ShelfSEO Free Tier
Free forever — 3 listing audits/month, 10 keyword lookups/day, full access to all public free tools.
ShelfSEO Mobile App
Capacitor-based iOS + Android app that wraps shelfseo.pro with native barcode scanner (ML Kit), push notifications, biometric login, and native share sheet.
ShelfSEO Pricing Model
Three tiers: Free → Pro (from $9.99/mo, three-arm A/B test at $9.99 / $19.99 / $29.99) → Agency $99.99/mo. 14-day free trial on every paid tier.
ShelfSEO Pro Tier
From $9.99/mo — unlimited listing audits, AI Listing Rewriter (50 rewrites/mo), unlimited keyword lookups, bulk audit + bulk rewrite, daily rank tracking, email + Slack alerts.
ShelfSEO Trial Period
14-day free trial on every paid tier — full Pro features, no credit card upfront.
Slack Integration (ShelfSEO)
Per-user Slack incoming-webhook config — ShelfSEO delivers algorithm shifts, rank drops, lost Buy Boxes, and repricing alerts to a chosen channel.
Snapshot Merge
ShelfSEO's logic to combine per-user snapshots with system-side snapshots (from the popular-SKU pipeline) when displaying tracked-listing history.
Spec Table
The key-value attribute display Walmart renders below the product description — the user-visible form of your filled attributes.
Sponsored Search Rank
Position of your sponsored ad placement in Walmart's SERP. Distinct slot from organic, with its own bidding-based auction.
Stockout Suppression
Walmart removes a listing from search results entirely when its inventory hits zero — even if the listing has an active Buy Box from another seller.
Supabase Row-Level Security (RLS)
Postgres-level access control that gates every row in ShelfSEO's database by the authenticated user_id — defense in depth even if the app layer leaks.
Trial Conversion Rate
Percentage of free-trial signups who convert to paid before the 14-day window expires.
UPC (Universal Product Code)
12-digit GTIN format — the standard barcode shape for North American consumer goods.
Variation Family (Parent-Child)
Walmart's parent-child SKU model — one parent listing with multiple child variants (size, color, style).
Vercel Cron
Vercel's native cron-job scheduler — declared in vercel.json, hits a configured URL on a schedule, authenticates against CRON_SECRET.
Walmart 1P Buy Box Bias
When Walmart 1P competes on a listing, 3P sellers almost never win the Buy Box — even with lower price + WFS.
Walmart Algorithm Pulse
Public, anonymized fleet-wide SERP-volatility signal at /walmart-algorithm-pulse — shows what % of tracked sellers saw a shift_detected event today.
Walmart Category Fee
Per-category referral-fee percentage Walmart deducts from every sale. Ranges from 6% (consumer electronics) to 20% (jewelry).
Walmart Compliance Checker
Standalone tool at /tools/walmart-compliance-check — paste a draft Walmart listing, get flagged for prohibited / gated / conditional category keywords before publishing.
Walmart Connect API
Advertising-side API for sponsored search + display campaigns. Distinct from the Marketplace API (catalog + orders).
Walmart Content Spec
Walmart's per-category content guidelines: required attributes, image rules, title format, description length minimums.
Walmart Dropshipping Policy
Walmart Marketplace allows wholesale dropshipping with documented supplier relationships but PROHIBITS retail-to-retail dropshipping (Amazon → Walmart, etc.).
Walmart Fee Category
The Walmart taxonomy node your listing falls under — drives both your referral-fee % and your category-specific attribute requirements.
Walmart Hero Image Rules
The primary product image must be on a pure-white (255,255,255) background, product centered, no text overlays, ≥2000×2000 pixels.
Walmart Keyword Difficulty
0-100 score reverse-engineered from SERP signals: sponsored density, total result count, exact-match-in-title count in the top 10.
Walmart Marketplace API
Walmart's catalog + orders + inventory + items API for marketplace sellers. Requires Walmart Partner Network approval (2-4 week review).
Walmart Pro Seller vs Pro Seller Badge
Same thing — 'Pro Seller' is the badge, 'Pro Seller Program' is Walmart's recognition tier for sellers maintaining 90+ Seller Score.
Walmart Prohibited Products
Categories Walmart will not list at all under any conditions. Includes tobacco, vape, CBD, controlled substances, weapons, adult content.
Walmart Restock Recommendations
Walmart Seller Center forecasted reorder quantities for WFS inventory — based on sales velocity + storage cost optimization.
Walmart Restricted Categories
Three tiers of category restriction: prohibited (cannot list), gated (need pre-approval), conditional (sellable with rules).
Walmart Sales Tax Collection
Walmart automatically collects + remits sales tax for 3P sellers in marketplace facilitator states (47 states + DC as of 2026).
Walmart Title Format (75 chars)
Walmart's preferred title structure: Brand + Product Type + Distinguishing Detail, with hard 75-character cap on most categories.
Walmart Trust & Safety
Walmart's seller-policing team — issues account warnings, compliance reviews, and suspensions for policy violations.
Walmart+ (Walmart Plus)
Walmart's subscription program ($98/yr) — analogous to Amazon Prime — with free 2-day delivery, free grocery delivery, member-only pricing.
WFS (Walmart Fulfillment Services)
Walmart's first-party fulfillment program — analogous to Amazon's FBA. Ship inventory to Walmart's warehouses; they pick, pack, and ship to buyers.
WFS Eligibility Checker
Walmart Seller Center tool that screens a SKU's size + weight + category against WFS acceptance rules before you send inventory.
WFS Fee Structure
Per-unit fulfillment fee (varies by size+weight) + monthly storage fee (per cubic foot). Favors low-cube, fast-turning SKUs.
White-Label PDF Audit Reports
Audit reports rendered with the agency's brand colors + logo + footer instead of ShelfSEO branding.
WPA (Walmart Performance Ads)
Walmart Connect's sponsored search + display + video advertising stack. Equivalent to Amazon Sponsored Products.
Score your first Walmart listing in under 30 seconds.
Sign up free — 5 audits per month forever, plus a 14-day Pro trial unlocking unlimited audits and AI listing rewrites. No credit card required to start.