How to run Facebook Ads for your online store: targeting, catalog and retargeting

The mandatory condition: Meta Pixel installed correctly and a Purchase event that sends the order value back into Meta. Without that signal, the algorithm does not know who bought and cannot find similar buyers. It is the foundation everything else is built on.

If you do not measure the purchase and its value, you are not advertising for sales, you are advertising for activity.

Pillar 1: audience targeting

In 2026 the logic of targeting has changed. You no longer build ultra-narrow audiences with dozens of interests. Meta finds buyers better when you give it room and a clear conversion signal. Here is what targeting that works looks like for a Romanian store.

Broad audience, guided by the Pixel

For new acquisition, a broad audience (Romania, age and gender relevant to the product, no dozens of interests) lets the algorithm optimise on the purchase signal. Advantage+ Audience goes the same way: you give it a starting point but let it expand. Tiny, over-segmented audiences raise cost and limit delivery.

Lookalike audiences

The most valuable audience for a store is the one built from its own buyers. A Lookalike based on customers who purchased, or high-value customers, finds people with similar behaviour. The cleaner the source list (real buyers, not mere visitors), the better the similarity.

What is specific to the Romanian market

In Romania, cash on delivery is still dominant in many categories, and that changes measurement. Some orders are cancelled at delivery, so the ROAS shown in Meta can look better than the actual revenue. Targeting has to be read through this filter, otherwise you optimise for orders that never turn into money.

Pillar 2: catalog ads

This is where e-commerce most often wins, and where most Romanian stores go wrong, because they do not use the catalog at all. Catalog ads (Advantage+ Catalog, the former Dynamic Product Ads) automatically show the right product to the right person, with up-to-date price and image, without you building each ad manually.

How it works

You connect your product catalog to Meta, usually through a feed from your store platform (Shopify, WooCommerce, PrestaShop, Magento) or through a catalog partner. Meta automatically pulls each product's title, image, price and stock. When someone views a product on the site, Meta can show them exactly that product in the feed, plus complementary products.

Why the feed matters

Just like in Google Shopping, catalog quality decides performance. Clear titles, clean images, correct price and up-to-date stock. A catalog with out-of-stock products or wrong prices wastes budget on items you cannot sell. The catalog is not a one-time setting, it is an asset you maintain.

An online store running Meta Ads without a connected catalog leaves on the table exactly the format that converts best.

Pillar 3: retargeting

Most people do not buy on the first visit. Retargeting brings back exactly the people who already showed intent, and it is almost always the most profitable part of the account. The structure that works for a Romanian store has three layers.

• Product viewers and add-to-carts: people who viewed a product or added it to the cart but did not buy. A catalog ad shows them the exact product they saw. The warmest audience and the best ROAS.
• 30-day site visitors: people who visited the site without a clear action. You bring them back with popular products or an offer.
• Existing customers: you do not always exclude them, you sell complementary products or bring them back to repurchase, especially in consumable categories.

The golden rule of retargeting in Romania: exclude recent buyers from the new-acquisition campaign, so you do not pay to reach people who just ordered. And keep frequency under control, because the same ad seen ten times by a small audience burns budget and annoys the customer.

The mistakes that burn budget

The most common ones, at Romanian online stores:

• Optimising for traffic or clicks instead of purchases.
• Pixel installed wrong or without a Purchase event with value.
• Audiences too narrow, with dozens of overlapping interests.
• Zero catalog ads, so zero dynamic product retargeting.
• Mixing new acquisition with retargeting in the same campaign, which stops the algorithm from optimising correctly.
• Ignoring the cash-on-delivery cancellation rate, which inflates apparent ROAS.

How it all ties into an account that sells

A healthy setup has one new-acquisition campaign on a broad and Lookalike audience, optimised for purchase, fed by the catalog, plus a separate retargeting campaign across the three warm-audience layers. You measure everything by the real order value, not by clicks. That is what turns Facebook Ads from a traffic channel into a sales channel.

Structuring a Meta Ads account for a Romanian online store, with correct measurement and a focus on return rather than traffic, is exactly the kind of project a certified agency such as DAFE Digital handles for stores that want measurable results, not just impressions. The details of how we work on Meta Ads are on our Meta Ads page.

What to do today

Go into Events Manager and check one thing: the Purchase event fires correctly and sends the order value. If it does not, pause any traffic campaign, because you cannot optimise for sales without that signal. Then connect your product catalog to Meta. With a Pixel that measures purchases and a connected catalog, you have the foundation on which targeting and retargeting actually produce sales.