What is remarketing?

Remarketing is the technique of re-exposing a message to the people who have already interacted with a brand, to bring them back towards an action: a visitor who left without asking for a quote, an abandoned basket, a video watched, an email opened, a customer to reactivate. It is the advertising lever with the best conversion rate, and also the one whose profitability is the most overestimated. This article defines remarketing, distinguishes it from retargeting, describes the channels and the audiences, sets the frequency and consent rules and gives the 2026 benchmarks. The methods platform by platform are detailed in Google Ads remarketing and retargeting on social media.

Remarketing or retargeting?

The two terms often mean the same thing. In strict usage, retargeting is the advertising shown to visitors identified by a cookie or a pixel (display, social), and remarketing covers all re-engagement actions, email and SMS included, existing customers included. Google uses “remarketing” for its advertising audiences, Meta says “retargeting”; the mechanics are identical: a list of people, a message adapted to what they have done, a frequency and a term.

The remarketing channels

The audiences to build

1. Engaged visitors who did not convert: two pages viewed or 60 seconds, without a conversion, 7 to 30 days; the base audience.
2. Basket or form abandonments: the most profitable audience, to be handled within 24 to 72 hours, with email first if the address is known.
3. Visitors to high-intent pages: pricing, quote, comparison, a product page viewed twice; a message that helps the decision.
4. Content readers: an article or guide read, without a visit to the offer pages; a message that moves them towards the offer, with a longer term in B2B.
5. Video viewers: 50% or 75% of a video watched; a warm audience with no site visit.
6. Your customers: to be excluded from acquisition campaigns, to be targeted for repeat purchase, upselling or renewal.
7. The exclusions: recent converters, current customers, visitors under 10 seconds, candidates and suppliers (careers pages, supplier contact).

These audiences are built in GA4 and shared with Google Ads; the procedure is in creating a custom audience in GA4. On Meta, they rely on the pixel and the conversions API described in the Meta pixel.

Frequency, term and message

• Frequency: 3 to 5 exposures per person per week; beyond that, the click-through rate falls and brand image suffers. Meta and Google allow a cap; failing that, reduce the budget or the term.
• Term: 7 to 30 days in B2C (the need fades quickly), 30 to 90 days in B2B (the cycle is long), with decreasing pressure.
• Message: adapted to what the person has done: a reminder of the product viewed, an answer to an objection (delivery, warranty, reviews), proof (a testimonial, a customer case), a limited offer as a last resort. Repeating the acquisition advert is the first mistake.
• Sequence: days 1 to 3 a reminder, days 4 to 10 proof, days 11 to 30 an offer or useful content; each step excludes those who have converted.

Consent and privacy

Advertising remarketing relies on cookies or identifiers that require the user’s consent (GDPR, ePrivacy directive). Without consent, the person does not enter the audience: in France, 25 to 40% of visitors refuse, and audiences are that much smaller. Google’s Consent Mode v2 and Meta’s conversions API model part of the missing conversions but do not allow refusals to be retargeted. Email requires explicit consent at the point of collection. The rules are detailed in GA4 and the GDPR and Consent Mode v2 with GA4 and GTM.

Benchmarks and measurement

Remarketing shows conversion rates 2 to 4 times higher than acquisition and CPMs 20 to 40% lower. Its reported ROAS (5 to 15 on Meta) is nevertheless misleading: 30 to 60% of the conversions attributed to it would have happened without it, because it addresses people already on their way. Three precautions: read conversions on the click alone rather than post-view, exclude customers and converters, and, for budgets of several thousand euros a month, measure incrementality with a control group. Remarketing complements acquisition; it does not replace it, and a remarketing audience with no new traffic runs dry in a few weeks.

The frequent mistakes

• A single “all visitors” audience: the same message for a blog reader and an abandoned basket.
• No exclusion of converters: the advertising chases the customer after the purchase.
• Unlimited frequency: 20 exposures a week, complaints and a damaged image.
• Endless term: a visitor from March retargeted in September.
• Judging by the platform’s ROAS: retargeting always looks profitable; only reading on the click or incrementality tells the truth.
• Forgetting email: the basket reminder by email costs almost nothing and converts at 5 to 15%; it comes before advertising.