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What Is Lookalike Audience?
Ads & Paid
Updated 18 September 2026
Quick Answer
A lookalike audience is a group of new potential customers an ad platform identifies as sharing characteristics with your existing customers or followers — used to find new people likely to be interested in your business.
Lookalike Audience vs. Target Audience — What's the Difference?
| Lookalike Audience | Target Audience | |
|---|---|---|
| How it's created | Automatically generated by an ad platform based on existing data | Manually defined by the business based on research and judgment |
Why It Matters
- It extends reach to new, relevant people without requiring you to manually define every targeting parameter yourself.
- It's often more effective than broad, manually-defined targeting since it's based on real behavioral patterns of your actual existing customers.
How It Works
- You provide a source audience — existing customers, email subscribers, or website visitors.
- The ad platform analyzes characteristics and behaviors common to that group.
- It identifies new people sharing similar characteristics to target with ads.
Key Takeaways
- A lookalike audience is generated by an ad platform based on similarity to your existing customers.
- It extends reach without requiring manual targeting definition.
- It's often complementary to, not a replacement for, manually defined target audiences.
Frequently Asked Questions
Do I need a large existing customer list to use lookalike audiences?
Most platforms need a minimum source audience size, but it's often smaller than people expect — even a modest customer or subscriber list can work.
Which platforms offer lookalike audiences?
Facebook/Meta Ads and Google Ads both offer versions of this feature, sometimes under a different name.
Is a lookalike audience better than a manually defined target audience?
It's often complementary — testing both can reveal whether the platform's data-driven matching outperforms manual targeting for your specific business.