Quicklinks are a collection of links to frequently used internet pages, which allows you to complete common actions.
The links that has been added to the Quick Links can be accessed from the homescreen of the mobile app.
It is not possible to create a Quick Link when you use your phone. To add a Quick Link, you need to use your computer. To learn more about how to create a Quick Link from your computer read this article How does Quicklinks work (Desktop).