Walmart Advertising Agency New York: What Ecommerce Brands Need to Know

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A Walmart advertising agency plans, builds and manages your Walmart Connect campaigns (Sponsored Products, Sponsored Brands and onsite display) so your listings win placements profitably instead of just spending. The good ones also fix the listing and account problems that cap ad performance, because on Walmart an ad can only perform as well as the item page it sends buyers to.

Seller Splash is a New York ecommerce marketing agency that runs Walmart advertising for sellers through one Walmart tool covering account management, PPC, display ads and listing optimization, alongside our Google Ads and SEO services. This guide explains what a Walmart advertising agency actually does, how Walmart's ad auction differs from Google and Amazon, what to look for before you sign, and when it makes sense to use a tool instead of a retainer.

Quick answer: what a Walmart advertising agency does

• Runs Sponsored Products, Sponsored Brands and onsite display campaigns inside Walmart Connect.
• Does the keyword research, bidding, negative targeting and budget pacing week to week.
• Fixes the listing quality, Buy Box and inventory issues that decide whether an ad is even eligible to show.
• Reports on sales attributed to ads, new-to-brand orders and total account growth, not just ROAS.
• Charges either a percentage of ad spend, a monthly retainer, or a flat software-style fee.

How Walmart advertising differs from Google and Amazon

Walmart Connect is a retail media network: ads run inside Walmart.com and the Walmart app, and Walmart closes the loop between the click and the sale with its own purchase data. Three things change how campaigns need to be managed compared with Google Shopping or Amazon Ads.

Relevance and listing quality gate eligibility. Walmart only shows a Sponsored Products ad when the item is already relevant to the query and in a winning or competitive Buy Box position. A bid cannot force an unoptimized listing into the results. That is why listing work and ad work have to happen together.

The auction rewards the organic signal. Items that already convert well organically tend to win ad placements at lower cost. Campaigns that feed sales into strong listings compound; campaigns propping up weak listings get more expensive every month.

Fewer levers, so each one matters more. Walmart's campaign types, targeting options and reporting are simpler than Google's. There is less to tune, which means the structure you choose on day one (automatic vs manual, keyword grouping, bid multipliers by placement) carries most of the result. For a full walkthrough of the ad formats, read our Walmart Connect advertising guide.

What a good Walmart PPC agency actually manages

Campaign structure

Automatic campaigns to discover converting search terms, manual campaigns to own them at the right bid, and separation by product group and margin so a 50% margin item and a 15% margin item are never under the same target. Placement bid multipliers (search in-grid, Buy Box, item page) set from performance data rather than defaults.

Keyword and item targeting

Weekly harvesting of converting search terms from automatic campaigns into manual ones, negative keywords to stop spend on terms that click but never buy, and item-level decisions on which SKUs get budget at all. A seller with 200 listings usually makes money on a few dozen of them in paid; the agency's job is to find out which.

Listing optimization

Titles, attributes, images and content quality score. On Walmart these are not "nice to have" for ads; they decide whether ads serve. If an agency only touches the ad console and never the listings, expect a ceiling. Our Walmart listing optimizer exists because this is the work most sellers skip.

Account health

Buy Box win rate, inventory depth, shipping speed and pricing. A listing that goes out of stock or loses the Buy Box stops serving ads instantly, and the campaign history that drove its ranking starts to decay. A genuine Walmart advertising agency watches these daily, not at the monthly review.

Reporting that ties ads to the whole account

Ad-attributed sales, total sales, the share of sales that came from ads, and new-to-brand orders. A rising ROAS with flat total sales usually means ads are cannibalizing organic orders you would have had anyway. Good reporting makes that visible. See what a good ROAS looks like and how to calculate break-even ROAS for the math behind the targets.

Agency retainer vs a Walmart advertising tool

Most Walmart advertising agencies charge a monthly retainer, a percentage of ad spend, or both. That model fits large sellers with complex catalogs. For sellers spending a few thousand dollars a month, the fee can eat most of the margin the ads produce.

Seller Splash built a different option: one Walmart tool with flat monthly pricing, no percentage of ad spend and no long-term contract, that runs account management, Sponsored Products and display campaigns, and listing optimization from one dashboard. You set goals and limits; the tool handles the day-to-day bidding, harvesting and listing fixes, and our team is available when you want a strategist on the account. For sellers who also run Google Ads or need SEO, the same team manages those through our agency services.

How to choose a Walmart advertising agency

Ask these before you sign:

• Do you manage listings and account health, or only campaigns? Ads-only management on Walmart leaves the biggest lever untouched.
• How do you separate campaigns by margin? If the answer is "one campaign per category", your low-margin items will set the targets for your best ones.
• What do you report besides ROAS? You want total sales, ad share of sales and new-to-brand numbers.
• Who owns the Walmart Connect account and the campaign history? It should be you, always.
• What is the fee as a share of expected ad profit? Run the math on your margin before you look at the headline price.
• Can you show results on Walmart specifically? Amazon experience helps, but Walmart's auction and listing rules are different. Our case studies show the kind of documentation to ask for.

Why New York sellers work with Seller Splash

We are an ecommerce marketing agency based in New York, and we run paid media for product brands across Google, Meta, Amazon and Walmart. On Walmart, our approach starts from the listing and the margin, not from the bid: fix what gates eligibility, structure campaigns by profit tier, then scale what the data supports. If you want a review of your Walmart account before deciding anything, book a free strategy call.

Related reading

• The Seller Splash Walmart tool: ads, listings and account management
• Walmart Connect advertising: the complete guide for sellers
• How to sell on Walmart Marketplace: a beginner's guide
• How to get approved to sell on Walmart
• Amazon PPC strategy for ecommerce brands

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