Mercado Libre Product Ads: how to set your target ACOS and sell more

Product Ads is Mercado Ads’ advertising tool for featuring your listings inside Mercado Libre, right where users are already looking for something to buy. Set up well, it is one of the most direct ways to sell more on the marketplace.

What target ACOS is

ACOS is the ratio between what you spend on advertising and what you sell thanks to it. If a campaign’s target ACOS is 10%, you are willing to spend up to $10 for every $100 in sales. According to Mercado Libre, a higher target ACOS increases the chance that your ads show above other sellers’: in practice, it is how much you are willing to pay for that visibility.

How to calculate each product’s maximum ACOS

The most common mistake is using a single ACOS for the whole account. Every product has a different margin and therefore tolerates a different advertising cost. A simple way to set the ceiling is to divide contribution margin by selling price: if a product sells for $10,000 and leaves you $2,500 in margin, any ACOS above 25% makes that sale lose money.

With that ceiling set, you can group products by role:

• Launches: you tolerate a higher ACOS for a limited period to gain visibility.
• Volume products: a tight ACOS to grow without losing profitability.
• Margin products: a low ACOS to hold position with the least possible spend.

The listing also affects the ads

Advertising brings visits; whether those visits buy depends on the listing. Price, shipping, photos, specs and reputation all affect conversion, and a listing that converts better lowers the ACOS of its ads. If any of those factors is holding performance back, it is worth spotting it before raising spend.

How to read the results

• ACOS and ROAS per campaign and per product, not just the account average.
• Clicks and conversion rate: if clicks rise and conversion falls, the problem is usually not the ads but price, shipping or competition.
• TACOS: ad spend over total revenue, including sales that do not come from ads, to see the effect of advertising on the whole business.

Target ACOS is not one number for the whole account: it is a per-product decision, based on its margin.

How we handle it at Semcial

We audit the Mercado Ads account, set the target ACOS for each product group based on its margin and prioritise spend on the listings that convert best. If something in a listing is holding the ads back, we flag it so your team can fix it.