O institutie ce reprezinta un advertiser, care furnizeaza servicii de creatie, account planning, media( planificarea si cumpararea pentru campanie). In ciuda numelui, majoritatea au statut legal si responsabilitate financiara.
A body acting on behalf of an advertiser which will provide services such as creative work, account planning, media planning and buying for the campaign. Despite the name, most have the legal status and financial responsibility of principal.