Why Retail Media is taking over ad spend in LATAM

What Retail Media is and why it beats traditional advertising

Meta and Google held a monopoly on attention for over a decade. But brands got tired of paying CPMs inflated by traffic that is only there for entertainment. Someone opening Instagram is looking for distraction; someone opening Mercado Libre or Rappi has a clear intent to buy.

To put it plainly: Retail Media is the network of ad placements that e-commerce platforms sell inside their own sites and apps. It lets brands sponsor products in internal search results, run banners on the checkout page and execute targeted campaigns using users' actual purchase data.

In Latin America, the loss of third-party cookie effectiveness accelerated the shift. Brands no longer want to guess whether a user cares about specialty coffee based on their likes. They would rather advertise where they know for certain that this user bought two kilos of beans last month.

Three advantages of Retail for campaigns with real intent

Social networks are excellent at generating demand and terrible at attributing it accurately. That is where e-commerce marketplaces and delivery apps hold the competitive edge.

• First-party purchase data: not inferred from incidental browsing. Actual payment records, delivery addresses and recurring consumption habits.
• Closed-loop attribution: you can directly measure whether a dollar spent on an ad inside the platform turned into a transaction completed in the same session.
• Impact at the moment of decision: the ad appears exactly when the user has their wallet out and a finger over the buy button.

The real value of advertising inside an e-commerce platform is not brand exposure, it is proximity to the checkout.

Retail examples in LATAM: from Mercado Libre to Rappi

Adoption in our region has very specific names attached to it. Mercado Ads, Mercado Libre's advertising arm, has reported year-on-year revenue growth above 50% in markets such as Mexico, Brazil and Argentina. Brands are not moving budget to these platforms because it is fashionable, but because return on ad spend frequently beats traditional direct response campaigns.

Rappi Ads, meanwhile, has built a highly effective model for fast-moving consumer goods in Colombia, Chile and Peru. A drinks brand can pay to appear at the top when someone searches "beer", and can also trigger cross-promotions right before the user finalises a food order.

Physical chains such as Falabella in the Southern Cone and Cencosud are also turning their online stores into media networks. They sell their audience to their suppliers, closing the gap that used to separate digital marketing from the traditional sales channel.

How to scale your Retail budget without burning margin

Entering this ecosystem requires a shift in mindset. It is not about duplicating your Meta Ads campaigns inside Mercado Libre. To optimise budget, apply a few specific steps:

1. Audit stock availability before you advertise

Advertising a product with thin inventory is throwing money away. If the platform's algorithm detects your product going out of stock mid-campaign, it penalises your organic relevance, and winning that position back will cost you twice as much.

2. Separate brand keywords from category keywords

Brand searches (your own name) have a high ROAS but little new volume. Category searches ("men's leather shoes") need more budget but capture customers who have not yet decided what to buy. Balance 70% on category and 30% on brand defence.

3. Protect profitability per SKU

Not all your products can absorb these platforms' cost per click. Calculate your gross margin per unit before switching campaigns on. If your margin is under 30%, ad cost will eat your profit even when the ROAS looks positive in the dashboard.

Ad budgets are moving away from chasing empty impressions and towards where sales actually close. The brands that learn to run these platforms as primary advertising channels, rather than as simple product catalogues, will take the market share in Latin America.