You can put a phone number on your infomercial and measure how many calls / conv... | Hacker News

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		charcircuit on Feb 12, 2022 \| parent \| context \| favorite \| on: Nearly a third of TV ads play to empty rooms You can put a phone number on your infomercial and measure how many calls / conversions you get from people calling that number shortly after the ad plays.

kerneloftruth on Feb 12, 2022 [–]

That's what "promo codes" are all about, too. Direct feedback as to which ads worked.

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