Marketplace
advertising

What marketplace advertising is

Marketplace advertising means paying to show your products in search results and product pages on Amazon.com or Walmart.com. When a shopper types "stainless steel water bottle" on Amazon, the first results are often sponsored. You pay per click, the shopper lands on your listing and, ideally, buys without leaving the marketplace. It's search advertising, like Google Ads, but with one big difference: the shopper is already on a store with a credit card on file and a Buy button in front of them.

That's why marketplace ads can convert very well. It's also why competition is fierce. In many categories, dozens of sellers bid on the same handful of searches, and the platform takes a cut of every sale on top of the ad cost.

Margins first, then bids

Before I talk about keywords, I want to see what one sale actually leaves you. For each product I list the cost of goods, the marketplace referral fee, fulfillment and storage fees, typical returns and shipping costs. What's left is the margin available for advertising and profit. From that I calculate a break-even advertising cost of sale (ACoS) per product, the line above which every ad sale loses money.

Some products can afford aggressive advertising because repeat purchases follow. Others should run on organic rank and a little brand defense. This analysis is what separates profitable marketplace advertising from expensive visibility. It's the same logic I use on Facebook ads for e-commerce, applied to marketplace fees.

How I deliver marketplace work

Amazon and Walmart advertising I deliver with a trusted partner who manages seller accounts and marketplace ads every day. The contract, deadlines and communication stay with me. In practice you get:

• one plan and one quote, from me,
• seller accounts, Brand Registry and ad accounts in your company's name,
• reports in the same format as your other channels,
• one person to call when something needs deciding.

Listings decide whether ads pay off

An ad brings a shopper to a listing; the listing closes the sale. Before raising budgets I check the basics: a title that matches how people search, main images that look clear at thumbnail size, bullets that answer real questions, enough reviews (collected within the marketplace's rules, never bought), and a price that holds up against competitors. Marketplaces reward listings that convert with better organic rank, so fixing a listing often lowers ad costs as well.

Amazon, Walmart and your own store

Marketplaces bring traffic you could never buy on your own, but the customer relationship mostly stays with them. I usually recommend treating marketplaces as one sales channel next to your own online store, not instead of it. Amazon is usually the first step; the details are on the Amazon ads page, and new sellers can start with selling on Amazon. Walmart is a strong second channel for everyday products; see Walmart Marketplace ads.

US rules worth knowing

The FTC's rule against fake reviews and testimonials, in force since late 2024, applies fully to marketplace sellers: no buying reviews, no paying for positive ones, no suppressing negative ones. Amazon's own policies are stricter still. "Made in USA" claims must meet the FTC's "all or virtually all" standard. Some product categories, such as supplements, cosmetics, children's products and electronics, need extra documentation or approval before you can sell. I flag these early; for legal questions, talk to your attorney.

Seasonality

Marketplace demand follows the US retail calendar closely. Amazon's Prime Day in summer, Black Friday and Cyber Monday, and the December holidays are the big peaks, with back-to-school and spring cleaning mattering in some categories. Inventory planning matters as much as ads here: running out of stock during a peak hurts organic rank for weeks afterward. I plan budgets and inventory warnings with you a couple of months ahead.

How to start

Book a free 30-minute call or send me your products and rough margins. If marketplaces fit, you'll get a written plan and an individual quote. If they don't, for example because margins are too thin after fees, I'll say so and suggest Google Shopping or Meta ads for your own store instead.