Google Records your Conversations
Seriously, we just checked and it included conversations we had around our phones. Most of the conversations were not intended to interact with our Google accounts by any means. You can check your transcripts by clicking on this link which should show only your audio transcripts: https://myactivity.google.com/myactivity?product=29
The article includes the general access link to other data that Google has archived: https://myactivity.google.com/myactivity
Once you go to the My Activity link you can filter your search to see other information. Delete it if you wish or leave it, that is a decision for you. We knew a lot about what Google archived from the places we visited physically to any web searches we have done but we had no idea that they recorded soooooo many of our conversations.