According to a report published last week, Amazon uses voice data from its Echo devices to serve targeted ads on its own platforms and the web. According to the report, which was created by researchers from the University of Washington, UC Davis, UC Irvine, and Northeastern University, Amazon's methods are in conflict with its privacy policies.
The report, titled “Your Echos are Heard: Tracking, Profiling, and Ad Targeting in the Amazon Smart Speaker Ecosystem,” concludes that Amazon and third parties (including advertising and tracking services) collect and share data from your interactions with Alexa via Echo smart speakers with up to 41 advertising partners. This information is then used to "infer user interests" and "serve targeted ads on-platform (Echo devices) and off-platform (web)." It also concludes that this type of data is highly sought after, resulting in "30X higher ad bids from advertisers."