Facebook Lookalike Audience is a group of Facebook users that you can use for targeting your ads. This type of targeting allows you to reach people who are similar to customers that you already might have (for example people who are similar to those, who purchased my product in last month).
Such group can be created from any Custom Audience that you already have. It’s important to remember that with Lookalike Audiences you can target only one country at once.
Created Audiences can be shared across multiple ad accounts.
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