In the recent social awakening to the data collection machine that is Big Tech, Google has introduced a comprehensive dashboard to understand what data is being collected, and why. I highly recommend reading spending time going through this dashboard and decide which features you are willing to give up privacy for and which ones you are not. THis dashboard includes tools to opt out of data collection programs you are not comfortable with. I especially found the following features useful:
Listening to and managing all of Google's recorded voice data (goes way back)
Learning which stored data is and can be used for advertisement
Understanding the full breadth of Google's location collection
What Exactly Is Being Collected?
A lot of this information is directly from Google's Privacy Dashboard, so once again go check that dashboard for detaileld information.
Name
Phone Number
Email Address
Payment Information
Unique Identifiers - used when not signed into google
Browser Information
Device Information
Operating System Information
Network Information
Interactions With Advertisements
Voice and Audio Information
Purchases
"People with whom you communicate or share content"
"Activity on third-party sites and apps that use our services"
"Voice and audio information"
"Views and interactions with content and ads"
Who Gets This Data?
Advertisers will not use information related to the following categories: race, religion, sexual orientation, or health
Advertisers will not use informaton from the following sources: Drive, Gmail, or Photos
Advertisers will not be able to personally identify you