Which advertising technique was first successfully deployed at scale by the Obama 2008 presidential campaign, revolutionizing political outreach?

Political campaigns and government agencies have evolved their advertising techniques significantly in recent decades. From traditional media to digital platforms, the strategies used to communicate policies, promote candidates, and engage citizens have transformed. This trivia question explores a groundbreaking advertising technique that changed how governments communicate with the public. Test your knowledge of the intersection between politics, government, and modern advertising innovations!

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Microtargeted social media advertising based on voter data analytics
Programmatic television ad buying using automated bidding systems
Blockchain-verified political messaging with authenticity certificates
Augmented reality campaign rallies accessible through smartphone apps