Current account
The current address receives a notification about the change. This helps you spot a change you did not make.
New email address
The new inbox receives the confirmation message and future recovery emails. Use an address that belongs only to you and will remain available.
Required security confirmation
If the account has a password, the form asks for it. If two-factor authentication is enabled, the form also asks for a current authenticator code.
Email verification
Open the message sent to the new address and confirm it. Then check that every linked sign-in method also belongs to you.