Introduction: Do you know that there are millions of people who resemble your current customers but do not know your brand yet? Meta's "Lookalike Audiences" feature allows the algorithm to use your existing data set (Custom Audiences) to find these potential customers. This is the most powerful way to increase conversion probability by targeting people who are demographically and behaviorally similar to those who interact with your brand, rather than showing your ads to a completely foreign audience.
Content:
How Does Lookalike Work? You select a Custom Audience as the source audience (e.g., those who purchased from your website in the last 180 days). Meta's AI analyzes the common characteristics (interests, behaviors, demographics) of these people. Then, it finds new people with these characteristics in your specified country.
Lookalike Percentages (1%, 3%, 5%): These percentages determine how "tight" the similarity is. A 1% Lookalike includes people who most closely resemble your source audience (usually the most profitable). As the percentage increases, the audience expands, and similarity decreases. You should increase percentages when scaling.
Quality of the Source Audience: The success of Lookalike depends on the quality of your source audience. Using a more specific source audience, such as "High-Value Customers" (e.g., the top 20% spenders), instead of "All Website Visitors," improves the quality of the Lookalike.
Conclusion: Lookalike Audiences are a balanced growth strategy that increases brand awareness while lowering conversion costs.
Sales & Growth
Reaching New Customers with Lookalike Audiences
Author
Hasan Şişik
Posted on
March 17, 2026
Read Time
5 minutes
Views
125

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