Definition
A lookalike audience is an audience the platform builds by finding users who resemble a source list you provide, such as past purchasers or high-value customers. Quality depends far more on the source list than on the percentage setting: a small list of your best customers usually beats a large list of all site visitors.
What to know
Tighter percentages mean closer resemblance and smaller reach. Broader percentages scale further but drift toward general prospecting.
As platform automation has improved, broad targeting with strong creative often matches or beats carefully built lookalikes, because the delivery system finds the buyers itself.
Related terms
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