If you have an Android phone with Android 7.0 and newer, you can turn your smartphone into a physical security key.
A security key is a way of verifying that you, and not someone else, is trying to sign into your account. There are various methods to secure yourself online – with a code sent by SMS or email and even with Google’s popular 2 Step Verification, where you set up the authenticator app, which generates a code every 30s. There are also physical security keys, such as Google’s own Titan security key.
Well now you can turn your smartphone into such a key. You need to be running Android 7.0 or newer, to have your Google Account set up on the phone and to have Google’s 2 Step Verification active.
Then every time a browser or a device wants to log into your Google Account, you can verify it’s you with your phone.