Add a title to name your quick reply. The title is mandatory and important because it is by the title that you will find your standard email in a drop-down list.
Example: Order tracking
Add a tag to group all the quick replies that relate to the same topic.
In this example, you can choose the "Order" TAG. When writing your email, you can choose a standard email from the drop-down list named Order. You will have listed there beforehand all the emails related to this theme: "Order tracking", "Delivery time" etc...
Add your template content. The template remains editable when you import it into an email.