AI-generated Key Takeaways
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A LookalikeUserlist is a list of users similar to a user-defined seed group.
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LookalikeUserlists are defined by seed user list IDs, expansion level, and targeted countries.
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The
seed_user_list_idsfield indicates the source user lists for the lookalike audience. - 
          
The
expansion_levelfield determines the size of the lookalike audience. - 
          
The
country_codesfield specifies the countries targeted by the Lookalike list using ISO-3166 codes. 
LookalikeUserlist, composed of users similar to those of a configurable seed (set of UserLists)
| Fields | |
|---|---|
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 Seed UserList ID from which this list is derived, provided by user.  | 
              
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                   Expansion level, reflecting the size of the lookalike audience  | 
              
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 Countries targeted by the Lookalike. Two-letter country code as defined by ISO-3166  |