Facebook outsourced with intentions to develop their voice recognition software. The contractors to which they outsourced confirmed they had no idea how Facebook got the voice recordings which were sent to said contractors. Facebook responded to these reports by saying the audio messages they recorded were collected from users who “confirmed the option in their messenger app”, Luckily I haven’t used Facebook in years. Also beware users, Facebook collects information from you and sells it to advertisers for massive profits. Likely it is just your search history but the true nature of personal data retrieved is unknown to most of the public. Another tip of advice, be care what you post on Facebook or any social media. Things as silly as political opinions or showcasing material goods could prevent you from getting a job.