https://www.cnet.com/news/amazon-workers-eavesdrop-on-your-talks-with-alexa/

The workers who review Alexa clips are searching for terms like "Taylor Swift," hoping to help Alexa get better at understanding that users are referring to the singer, according to the Bloomberg report. But they also sometimes hear private or even disturbing audio, as well as recordings that weren't triggered by Alexa's wake word.

In response to the report, an Amazon spokesperson said in an email that the company takes user privacy seriously. "We only annotate an extremely small sample of Alexa voice recordings in order improve the customer experience. For example, this information helps us train our speech recognition and natural language understanding systems, so Alexa can better understand your requests, and ensure the service works well for everyone," the spokesperson said.