Templates are a system wide “Content”. They are used to load samples into new Contents. Templates contain widgets and can be edited in the Template Editor which is exactly the same as the 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 the Content.