Which market research technique was pioneered in political campaigns and is now credited with revolutionizing how politicians tailor messages to specific voter segments?

In today's data-driven political landscape, market research plays a crucial role in shaping campaign strategies, policy positions, and voter outreach. From focus groups to sophisticated polling, political campaigns rely heavily on understanding voter sentiment. This trivia question explores how politicians and their teams utilize market research to connect with their constituents and win elections.

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Microtargeting (using big data analytics to identify and message small groups of voters based on specific characteristics)
Deliberative polling (gathering random citizens for extended policy discussions to measure opinion shifts)
Ethnographic research (embedding researchers in communities to observe voter behavior firsthand)
Exit polling (interviewing voters immediately after they cast their ballots)