Facebook, which first initiated the concept of a lookalike audience as a new targeting tool for digital marketing and has a minimal lookalike seed size of 100 users from the same country, generally recommends creating a seed from an audience of 1,000 to 50,000 users.
In the digital advertising age, it refers to a new targeting tool for digital marketing, first initiated by Facebook, which helps to reach potential customers online who are likely to share similar interests and behaviors with existing customers. In Facebook, the minimal lookalike seed size is 100 users from the same country. Facebook generally recommends creating a seed from an audience of 1,000 to 50,000 users. 
