How long does a Facebook ad need to run to be a winner? What 3,690 winning ads in Europe show
12 Nov 2026. Data read 2026-11-11 and 2026-11-12 (frozen 2026-11-12 18:23 UTC)
In short. Poseidon counts an ad as a winner once it is still running after 21 days. Among 3,690 such e-commerce ads in the EU, read on 12 November 2026, the median ad had been live 115 days, and only 4.5% had passed a year. But days live alone does not tell you how big a winner is. The top 10% of ads live 21 to 59 days had each reached at least 450,050 people in the EU, more than twice the median reach of ads live over a year (207,563).
All reach figures are Meta's own, from the EU transparency section of each ad in the Meta Ad Library. Groups under 30 ads are not shown.
Why "days live" is the first signal
A brand pays for every day an ad runs, and it sees its own sales numbers. Keeping an ad live for three weeks is a choice it makes with those numbers in view. That is the signal the Ad Library's "started running on" date gives you for free, and why Poseidon only follows ads past 21 days.
The limit: days live says the ad survived, not how hard it was pushed. A small brand can leave a modest ad running for months at a low budget. That is where reach comes in.
How long do winning ads run?
| Days live (on 12 Nov 2026) | Winning ads | Share | Median EU reach | Top 10% reach at least | Share with 2+ versions |
|---|---|---|---|---|---|
| 21–59 | 1,019 | 27.6% | 71,064 | 450,050 | 17.1% |
| 60–179 | 1,681 | 45.6% | 88,318 | 643,504 | 18.0% |
| 180–364 | 823 | 22.3% | 154,153 | 1,145,259 | 11.4% |
| 365 or more | 167 | 4.5% | 207,563 | 1,684,803 | 15.6% |
| All winners | 3,690 |
Median days live across all 3,690: 115 days.
What this shows:
- Most winners are between 2 and 6 months old. 45.6% sit in the 60 to 179 day band.
- Reach grows with time, as you'd expect, because Meta's reach counts everyone who saw the ad since it started. The median goes from 71,064 people (21 to 59 days) to 207,563 (a year or more).
- The spread inside each band is huge. In every band, the top 10% reached at least six times the median. Two ads with the same start date can be a test and a scale.
- Versions don't follow age. The share of ads running in 2 or more versions stays between 11.4% and 18.0% in every band.
So what should you check, beyond days live?
- Real reach, by country. Two ads live 40 days can sit at 70,000 and 450,000 people. In the EU, Meta publishes this number on every ad.
- Reach growth. An ad still gaining reach today is being pushed today. Poseidon reads reach every day to get this curve.
- Who it reaches. Meta also gives reach by age and gender. It often differs from the targeting (see who sees winning ads in Europe).
- Versions. The number of copies Meta groups under the same ad in the Ad Library.
Does the format change how long ads run?
| Format (Meta's label) | Winning ads | Share | Median EU reach | Top 10% reach at least | Median days live | Share with 2+ versions |
|---|---|---|---|---|---|---|
| Video | 1,813 | 49.1% | 116,168 | 958,342 | 111 | 20.5% |
| Single image | 1,022 | 27.7% | 62,120 | 443,487 | 109 | 14.4% |
| Dynamic creative | 702 | 19.0% | 126,231 | 904,440 | 128 | 10.8% |
| Catalog ads | 122 | 3.3% | 186,033 | 906,221 | 136 | 0% |
| Carousel and others | 31 | not shown, fewer than 30 ads |
Video and single image winners run about as long (111 and 109 days at the median), but the median video winner has reached nearly twice as many people (116,168 against 62,120).
How this was measured
- Source: Meta's EU transparency data on each ad in the Ad Library (EU reach, reach by country, by age and gender). Read by Poseidon on 11 and 12 November 2026, snapshot frozen at 18:23 UTC on 12 November.
- Which ads: e-commerce brands on Poseidon's watchlist (1,293 confirmed shops, 37,684 ads seen). Reach is read only for winners: ads still active and live 21 days or more. 3,690 had a reach read at the snapshot.
- Days live: from Meta's start date to the last day we saw the ad active.
- Reach: Meta's count of people in the EU who saw the ad at least once since it started.
- Versions: the number of copies Meta groups under the ad in the Ad Library.
- What this can't tell you: sales, spend or profit. Meta doesn't publish them for commercial ads. Reach and days live are signals, not proof of profit. Ads cut before 21 days are not in this data, so this page can't say how many ads fail.
FAQ
Is 21 days the right threshold? It is Poseidon's line between "still a test" and "kept by the brand". The table shows that most winners go far beyond it (median 115 days).
Can an ad be a winner after 7 days? It can be scaling fast, but it hasn't yet proven it survives. Poseidon tracks its daily reach from day 21.
Does this cover the UK? Not yet. This data comes from the EU section of each ad's transparency data, so UK reach is not in it. UK figures will get their own page once Poseidon reads them.
Poseidon follows every winning e-commerce ad in the Meta Ad Library, every day, with its real EU reach, its script and the shop behind it. Check how long the winners in your niche have been running →
Ask Poseidon what's winning. askposeidon.app