Hindustan Unilever, Amazon, Wipro and ITC are among India’s top advertisers. In 2019, they, along with many others, spent Rs 32,000 crore buying advertising seconds on 800 plus channels, including Zee TV, Colors and Sun TV. To decide on the channel, show, quantity, placement and so on they used the world’s largest television audience measurement system — Broadcast Audience Research Council (Barc) data. In the five years of Barc’s existence, no advertiser has complained about the data or stopped using it; nor has any media agency. That makes it difficult to understand why the Telecom Regulatory Authority of India (Trai),
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