Template is a system wide “Content”. It is used to load samples into new Contents. It contains widgets, and can be edited in Template Editor which is exactly the same as Content Editor.
You can find your templates in the Administrator / Templates Menu.
You can create, remove, and edit your templates here.
You can export and import templates.
When you create a Content you can select a Template on the Create Content modal.
Administrators can create Template from Content in the Context menu of the Content.