Item setup: single items, Setup by Match, and bulk spec uploads

Collect, for every item: the GTIN, your SKU, brand, product name, product type, the required attributes for that type, key features (bullets), a description, price, shipping weight and dimensions, and image URLs — Walmart ingests images from publicly reachable URLs in setup feeds, so the images must be hosted before the upload. Main images should be at least 1,000 px square on a white background; 2,000 px is the recommendation.

Check the sheet for the four classic faults: blanks in required attributes, inconsistent units (mL in one row, oz in another), duplicate SKUs or GTINs across rows, and values in the wrong column (a case quantity in the unit-count field). Confirm any missing value from an approved source. A required field filled with a plausible guess passes processing and produces a wrong item.

• Single item (Catalog → Add New Items) — enter the GTIN; if Walmart already carries the product, you are offered a match and only supply offer data. Otherwise you complete the full form for the product type. Good for a handful of items.
• Setup by Match — a bulk spreadsheet for items that already exist on Walmart.com: GTIN, SKU, price, quantity, shipping, and little else. Fast, but you inherit the existing content.
• Full Item Spec — the category-specific template for new items: every attribute, images, and offer data. Download the spec for the product type from Add New Items, complete it, upload it.

Pick per batch: match what exists, create what does not, and do not create a new item for a product already in the catalog — Walmart de-duplicates by GTIN and will merge or reject it.

Every upload becomes a feed with an ID. The Activity Feed shows its status and, per item, whether it succeeded or errored with a message — a missing required attribute, an invalid GTIN, an image URL that could not be fetched, a value outside the allowed list. Fix the affected rows and resubmit only those. A feed that reports success has been ingested; it has not necessarily published.

After processing, check three places: Manage Items for the SKU's published status, Unpublished Items if it is not live (the reason code tells you what to fix), and the live Walmart.com page for content, images, and the offer. Only then mark setup complete.