Google now allows you to password-protect your Google account’s My Activity page so that others sharing your device can’t snoop on your online activity. Users of Google services can see their collected activity by going to the ‘My Activity’ page. Instead of automatically allowing logged in users to view their data, it will first prompt them to enter their password before granting access to the page. The page will not show your search activity, but instead, you will be prompted to enter your password again to view your data.
Source: https://www.bleepingcomputer.com/how-to/google/how-to-password-protect-your-google-activity-history/