Limit how much Amazon knows about you
How to Delete an Amazon Alexa Account (EASY!)
Amazon’s Alexa keeps track of what you say to her. Everyone knows this and even consents to it if you agree to the terms of service. The Echo uses its recordings to better recognize your individual speech patterns.
Amazon claims it doesn't use the information for marketing purposes, but many users are skeptical, especially after last year's data debacle with Facebook.
The good news is that you don’t have to throw away your Alexa in the name of privacy. You can delete your Alexa information.