Set up two-step sign-in This protects your account even if someone learns your password. How would you like to get your sign-in codes?
Simplest. A six-digit code is sent to when you sign in.
A code from an app on your phone. Works without e-mail.
Two-step sign-in is on. Keep these spare codes somewhere safe (print them or save them in your notes). Each one works once, if you ever lose your phone. They are shown only now.