Retailers have built advertising businesses selling access to their own customers, and it has changed what shoppers see.
The business
Selling sponsored placement, display advertising and audience data to suppliers.
Which carries very high margins compared with selling goods.
It has become a substantial profit contributor at major retailers.
Why retailers can charge for it
They know what customers actually buy rather than what they browse.
Which is more valuable to advertisers than most audience data.
Closed-loop measurement linking an advertisement to a purchase is the specific advantage.
Sponsored search results
Paid placement within product search on retailer sites.
Which is labelled to varying degrees of prominence.
Regulators have examined disclosure adequacy in several jurisdictions.
Effects on what you see
The first results reflect commercial arrangements as well as relevance.
Which shifts discovery toward suppliers willing to pay.
Smaller suppliers without advertising budgets become less visible.
In-store applications
Digital displays, shelf screens and app-based offers.
Which extends the model beyond online.
Trials have been conducted extensively and rollouts vary by retailer.
Data and privacy
Targeting relies on loyalty and purchase data.
Which is governed by privacy policies and by state privacy laws in several jurisdictions.
Rights to opt out of sale or sharing of personal information exist in some states.
Supplier perspective
Advertising spend has become effectively necessary for visibility.
Which functions as an additional cost of doing business with large retailers.
That cost ultimately appears in product pricing.
What shoppers can do
Scroll past sponsored results, sort by price or rating, and use privacy settings where available.
Which restores some of the discovery the commercial layer displaced.
Measurement claims
Closed-loop attribution linking exposure to purchase.
Which is what advertisers pay a premium for.
Methodology varies between networks and is generally not independently audited.
Supplier negotiations
Advertising commitments have become part of broader supplier agreements.
Which blurs the line between trade terms and media spend.
Regulatory attention to this practice has increased.
Off-site extension
Retailer audience data used to target advertising elsewhere on the internet.
Which extends the model beyond the retailer's own properties.
Privacy law compliance for this use is an active area.
Effects on assortment
Products from suppliers investing in media receive more visibility.
Which affects what sells and therefore what continues to be stocked.
What to do as a shopper
Sort deliberately, look past sponsored results, and use available privacy controls.
Growth and profitability
These businesses carry margins far above retail operations.
Which is why they have grown so quickly at major retailers.
Disclosed figures in financial reporting show the scale.
Smaller retailers
Building these capabilities requires scale and data infrastructure.
Which advantages the largest operators further.
Third-party platforms offer capability to smaller retailers at a share of revenue.
Advertising transparency
Advertisers have raised questions about measurement standards and independent verification.
Which industry bodies have begun to address.
Standardisation efforts are under way and are incomplete.
Shopper experience
Increased advertising density in search results and on category pages.
Which is measurable and has been criticised.
The underlying trade
Retailers monetise attention that shoppers provide, and the cost appears in prices paid by everyone.
Why it grew so fast
Retailers hold purchase data that no other party has, and advertising margins dwarf retail margins.
That combination made building these businesses the single most attractive investment available to large retailers.
What it means at the shelf and on the screen
The most visible products are increasingly those whose suppliers paid for visibility.
Regulatory attention
Disclosure of paid placement and the adequacy of sponsored labelling have been examined by consumer authorities.
Which has produced guidance on how clearly advertising must be distinguished.
Enforcement in this area is ongoing.
A closing observation
Retailers discovered that knowing exactly what people buy is worth more to advertisers than selling the goods is worth to the retailer.
That realisation has restructured the economics of large-scale retail within a few years, and its most visible effect is what appears at the top of a search result.
A practical checklist
Scroll past sponsored results, sort deliberately by price or rating, and use privacy controls where they exist.
State privacy laws provide opt-out rights in several jurisdictions, and exercising them takes a few minutes per retailer.
Comparing against a retailer outside the platform remains the most effective check.
Why this is the fastest-growing part of retail
Advertising margins are multiples of retail margins, and retailers hold data on actual purchases rather than on browsing.
That combination made these businesses the most attractive investment available to large retailers, and their growth rates in disclosed reporting reflect it.
One last point
The advertising you see on a retailer's site is funded by suppliers whose costs appear in the prices on the same page.
That circularity is worth keeping in mind while browsing.
The most useful habit is simply to look past the first row of results.