Which government advertising campaign was the first to use microtargeted digital ads based on citizens' behavioral data to dramatically increase participation in a public program?

Throughout history, governments have launched various advertising and public awareness campaigns to influence citizen behavior, promote policies, or address social issues. These campaigns often employ innovative marketing strategies similar to those used by commercial brands. This trivia tests your knowledge about a groundbreaking government advertising campaign that changed how public sector messaging is approached.

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UK's 'GREAT Britain' campaign (2012) for economic growth and tourism
Singapore's 'Smart Nation' digital transformation initiative (2014)
Australia's 'Slip, Slop, Slap' skin cancer prevention campaign (1981)
USA's 'Got Milk?' dairy promotion campaign (1993)