Google has new auto-delete controls that can basically self-destruct your search history after a certain period of time. Right now the options are 3 or 18 months, but the default is indefinite unless you change it. The controls are actually pretty easy to find and tweak. Watch my easy to understand video to see how to change the auto-delete setting for Web & App Activity, aka all the stuff you do on Google.
— Google (@Google) June 26, 2019