Open the Google app, Gmail, or any Google service you are signed into
Tap your profile picture in the top right
Tap Manage your Google Account
Go to the Security tab if needed
Select Sign out or remove account from the device
On a browser, go to your Google Account page
Click your profile picture in the top right
Click Sign out
If you want to sign out of all devices, go to Security
Under Your devices, select Manage all devices
Choose the device and select Sign out
On Android, open Settings
Tap Passwords & accounts or Accounts
Select Google
Tap Remove account
Confirm removal
On iPhone or iPad, open the Google app or Gmail app
Tap your profile picture
Tap Manage accounts on this device
Tap Remove from this device
Confirm the action