How to add a signature in Gmail

Gmail is my main email account of choice; I'm one of many. In October 2018, #Google announced the service has over 1.5 billion users.

You can add a signature to your account so that a quote, additional contact details, or website links appear on every message you send. There are different setup processes for your account accessed on a desktop/laptop computer and a mobile device.

Note: The following applies to personal @gmail.com addresses. A separate process is used for business email hosted through G Suite.

Gmail via a desktop/laptop computer

iOS Gmail app

Android Gmail app