Asus Zenfone 3 Deluxe ZS570KL delete your Google & Gmail account

OS: Android 6.1 (Marshmallow), upgradable to Android 8 (Oreo); ZenUI 3

CPU: Quad-core (2x2.15 GHz Kryo & 2x1.6 GHz Kryo)
-Quad-core (2x2.4 GHz Kryo & 2x2.0 GHz Kryo)

Display: 5.7" inc

Camera: 23 MP, Single

Remove a Google account on Asus Zenfone 3 Deluxe ZS570KL

You need to delete your Google account from your phone if you are selling the phone to another user and do not want him to get access to your mail or other Google services.

What happens after deleting a Google account?
All data and content associated with the account will be erased, including emails, files, calendars, and photos.
You won't be able to use Google services that require you to sign in to your Google account (such as Gmail, Drive, Google Play or Calendar).
You will lose access to subscriptions and content purchased through this account on Google Play and YouTube (for example, applications, games, music, TV series).

How do I remove a Google account from my phone?
Go to the Settings section.
Select Accounts and backup.
Click Manage Accounts and delete your account.