Lookalike Audience generally means an "algorithmically-assembled group of social network members who resemble, in some way, another group of members".[1] In 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.[2] Since Facebook debuted this feature in 2013, additional advertising platforms have followed suit, including Google Ads[3], Outbrain[4], Taboola[5], LinkedIn Ads[6] and others.