If you have Siri or Alexa on your phone, or use the Google one that comes with an Android, it is indeed listening all the time, whether or not you use it.
I think you can turn it off - I think I did so - but it’s kind of sneaky and hard to get rid of. It’s listening all the time so that you can give it commands, but obviously, it’s picking up a lot of other info and just adding it to its commercial data file on you.
If you have Siri or Alexa on your phone, or use the Google one that comes with an Android, it is indeed listening all the time, whether or not you use it.
When I’m at someone’s house that has Alexa, it’s fun to say, “where will we put the bomb? Or “At what time will the bomb detonate?”