This is about what does Google know about which is very important to you. So many people around the world people have a different perception, and how to delete the track information if they want.
What is Google - My activity and How to Access It
This is about how Google is monitoring your every move. You can now actually see exactly what it is that they're monitoring.
First of all, you have to be logged in to your Gmail account that you will be pretty much using, and I'm pretty sure that everyone uses Google and the main search bar type in my activity.
Click on my account Google, scroll down, you can check everything on here your settings, what have you, and then click on this bit here, which says my activity. Go to my activity, click on that and you'll see exactly how far Google has been recording your search history.
Other web page resource
View & control activity in your account - Computer - Google Account Help: https://support.google.com/accounts/answer/7028918?co=GENIE.Platform%3DDesktop&hl=en