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What your smart devices are listening for

A pair of Amazon Echo smart speakers. Photo: Joby Sessions / T3 Magazine via Getty Images

Amazon and Google, the leading sellers of digital assistants like Alexa, have each "filed patent applications that outline an array of possibilities for how devices like these could monitor more of what users say and do," the N.Y. Times reports.

Why it matters: "That information could then be used to identify a person’s desires or interests, which could be mined for ads and product recommendations."