The essentials
- Definition: remarketing (or retargeting) means showing ads to people who have already interacted with your site, your app, your videos or your customer base, to bring them back to an action.
- What changed: the end of third-party cookies and consent requirements are shrinking site audiences; customer lists (Customer Match), GA4 audiences and Performance Max audience signals are taking over.
- What pays: segmenting by intent (abandoned basket, pricing page viewed, quote started) and adapting the message, rather than uniform retargeting of every visitor.
- Benchmarks: cost per conversion often 30 to 60% lower than acquisition campaigns; cap at 3 to 5 impressions per day per person.
The aim of remarketing is aimed at people who already know you: site visitors, app users, viewers of your videos, customers in your database. It converts better and more cheaply than acquisition, provided you segment and get the dosage right. Since 2024-2025, the gradual disappearance of third-party cookies and mandatory consent have reduced classic site audiences; effective strategies now rely on first-party data and on Google's audiences. This article describes the audiences, the formats, the segmentation and the settings. The overview of remarketing is in remarketing.
The audiences available in 2026
| Source | How | Strengths | Limits |
|---|---|---|---|
| Site visitors (Google tag) | Segments by pages viewed, events, duration, recency | Precise by intent | Reduced by consent refusals and by browsers; membership duration up to 540 days |
| GA4 audiences | GA4 segments exported to Google Ads (linked account) | Rich conditions (sequences, key events, value), shared with the analysis | Same consent limits; time to fill up |
| Customer lists (Customer Match) | Upload of hashed emails, phone numbers and addresses, or through a connected CRM | Independent of cookies; customer, prospect and former customer segments | Match rate of 30 to 60%; consent for marketing use required |
| YouTube viewers | Video views, subscribers, interactions | Free to build, broad | Low intent |
| App users | Firebase SDK | Precise | Apps only |
| Performance Max audience signals | Your lists act as a hint for automated targeting | Extends beyond the lists | Little control over delivery |
Remarketing formats
- RLSA (remarketing lists for search ads): adjust bids or target broader keywords for known visitors; for example bid +30% for a past visitor to the pricing page, or target generic queries only for warm audiences.
- Display: responsive banners on partner sites; the classic format, to cap on frequency and to exclude from low-quality placements (apps, children's content).
- YouTube: short videos to past visitors, effective for long cycles and B2B.
- Performance Max: your lists as audience signals; the campaign retargets and prospects at the same time; measure the share of new customers.
- Demand Gen: visual formats on YouTube, Discover and Gmail, with lists and similar audiences.
- Shopping and dynamic retargeting: products viewed shown again; see dynamic retargeting.
Segmenting by intent: what pays
| Segment | Definition | Message | Duration |
|---|---|---|---|
| Abandoned basket or quote | begin_checkout event or form started without a conversion | Precise reminder, help, proof, possibly an offer | 7 to 14 days |
| Strong intent | Pricing page, contact page, product page viewed for more than 60 s | Deciding argument, testimonial, guarantee | 14 to 30 days |
| Interest | Several pages or a guide read | Complementary content, case study | 30 to 60 days |
| Customers | Customer list or past conversion | Repeat purchase, upselling, referral; to exclude from acquisition campaigns | Permanent |
| Inactive former customers | CRM list with no purchase for N months | Reactivation | One-off campaign |
| Bounce visitors | One page, less than 10 s | To exclude or minimal budget |
Each segment has its own message and its own bid; uniform retargeting of “all visitors” wastes budget on bounces and irritates customers. Audiences are built in GA4 so they can be shared; see creating a custom audience in GA4.
The settings that avoid waste
- Frequency cap: 3 to 5 impressions per day per user on Display; beyond that, the effect reverses.
- Exclusions: recent converters (except for a post-purchase message), customers for acquisition campaigns, low-quality placements, mobile apps if they are not relevant.
- Membership duration aligned with the buying cycle: 7 days for a basket, 90 days for a B2B project.
- Varied and refreshed creatives every 4 to 6 weeks; remarketing wears visuals out fast.
- Consent: remarketing tags depend on
ad_storageandad_personalizationbeing granted; without Consent Mode v2, no European audiences; see Consent Mode v2. - Attribution: remarketing captures conversions that acquisition prepared; read it with data-driven attribution, not on last click alone; see attribution in GA4.
Measure
Track by segment: impressions and reach, conversion rate, cost per conversion, share of incremental conversions (a test with a control group or a campaign experiment), and average frequency. Compare with the cost per conversion of acquisition campaigns: remarketing should be clearly lower (often 30 to 60%). Remarketing whose cost per conversion catches up with acquisition points to segments that are too broad or to excessive frequency. The metrics are in the Google Ads KPIs.
How GreenRed helps
Rather than juggling several tools, GreenRed's Google Ads module brings these metrics together in a single dashboard, compares them over time and tells you which actions come first. You can try it free, with no card, from the Pricing.
Frequently asked questions
Does remarketing still work without third-party cookies?
Yes, but differently: site audiences depend on consent and on browsers, and have shrunk. Customer lists (Customer Match), GA4 audiences built on first-party data, YouTube viewers and Performance Max audience signals are taking over. Collecting emails with marketing consent has become the main asset.
What frequency for remarketing ads?
A cap of 3 to 5 impressions per day per user on Display, and a membership duration aligned with the buying cycle (7 to 14 days for a basket, 30 to 90 days for a project). Beyond that, the ads irritate and the conversion rate falls. Refresh the visuals every 4 to 6 weeks.
Should customers be excluded from remarketing?
From acquisition and first-conversion campaigns, yes: showing them a welcome offer wastes budget. A dedicated campaign for customers (repeat purchase, upselling, reactivating inactive ones) with a suitable message, on the other hand, is often the most profitable in the account.
Does remarketing artificially inflate conversions?
On last click, it captures conversions that other channels prepared. Read it with the data-driven attribution of Google Ads and GA4, and measure incrementality through an experiment with a control group when the budget allows. Well-segmented remarketing stays incremental; mass retargeting of every visitor barely is.