Google Enables Users to Apply Password Protection to their Web and Activity Pages
So in order to activate the verification, you can visit activity.google.com, and tap on the Manage My Activity verification link. From my activity menu, users can click on the Require Extra Verification option, and afterward, enter your Google account password to affirm that the original user is making the changes. On the other hand, if the verification is turned off, activity.google.com will display all of your Google activity from across your devices, without asking for a password as you can see in the below-mentioned image.