Lookalike Audiences Today
Lookalikes were the crown jewel of Facebook targeting for a decade: show Meta your best customers, and it finds more people like them. They still work — but their role in 2026 is different, and knowing that saves you from misusing them.
Lookalike audiences find new people who resemble a source you provide, and their quality depends entirely on that source. In 2026 they are usually a suggestion, and a strong custom audience fed into Advantage+ often outperforms a manual lookalike.
01How they work
You give Meta a source audience — your customers, leads, or website converters — and Meta finds new people who resemble them across its platforms. It's how you scale beyond people who already know you, without hand-picking interests.
02Source quality is everything
A lookalike is only as good as the list it's built from. Feed it a random list and you get a random result. Feed it your actual buyers — better yet, your high-value buyers — and Meta hunts for more of your best customers. Aim for a source of at least 1,000–ish people for a meaningful pattern.
If you send purchase value with your events (Module 3), you can build a lookalike from your highest-spending customers. Instead of “more buyers,” Meta looks for more high-value buyers — a meaningful upgrade for many businesses.
03Choosing the size
Lookalikes range from 1% (the closest match to your source, narrowest) up to 10% (much broader, less similar). Start on the tighter end — around 1–3% — when your source is strong, and widen only if you need more scale.
04Their honest role in 2026
Here's the update most guides skip. Like interests, lookalikes are now usually treated as a suggestion — for many common goals you can't hard-restrict delivery to them. And with Meta's AI so capable, a strong Custom Audience fed straight into Advantage+ often outperforms a manually built lookalike.
So lookalikes haven't died — they've been demoted from “the strategy” to “a useful signal.” They're most helpful for newer accounts where Meta lacks data, or as one more seed layered into a broad campaign.
Build one lookalike from your best customers and treat it as a starting signal, not a fence. Don't agonise over 1% vs 2% vs 3% — source quality matters far more than the percentage.
A lookalike built from a tiny, stale, or irrelevant source is worse than no lookalike — it points Meta at the wrong people with false confidence. Fix the source before you blame the tool.
- Lookalikes find new people who resemble a source you provide.
- Source quality decides everything — use your best (or highest-value) customers.
- Sizes run 1% (closest) to 10% (broadest); start tight.
- In 2026 they're a signal, not the strategy — strong custom audiences often win.
Frequently asked questions
How do Meta lookalike audiences work?
You give Meta a source, such as your buyers or leads, and it finds new people who resemble them. Feed it your best or highest-value customers for the strongest result.
What lookalike percentage should I use?
Start tight, around 1 to 3%, when your source is strong, and widen toward 10% only if you need more scale. Source quality matters far more than the percentage.
Do lookalikes still work in 2026?
Yes, but as a signal rather than the strategy. They help newer accounts, though strong custom audiences fed to Advantage+ frequently perform better.
Return to the Meta Ads course hub for the full curriculum.