https://www.theverge.com/2018/4/13/17229912/facebook-microphone-listening-instagram-conspiracy

Facebook users have continuously worried that the social media platform’s mobile apps, including Instagram, listen in on our conversations. It’s such a widespread concern that Facebook CEO Mark Zuckerberg had to address it in a congressional hearing on privacy this week, where he called the notion a “conspiracy theory.”

I hate to break it to everyone, but as far as we can tell, Facebook’s eavesdropping is a myth. Although I understand why the myth exists. People see eerily exact, targeted ads — sometimes about things they just discussed with friends — and they have to question what’s really happening behind the scenes. How does Facebook know what I’m talking about, and why am I getting served these ads at this exact moment?