Template is essentially a model that serves as the basis for something. An Excel template is a workbook that’s used to create other workbooks.
To view the Excel templates, choose File » New to display the available templates screen in Backstage View. You can select a template stored on your hard drive, or a template from Microsoft Office Online. If you choose a template from Microsoft Office Online, you must be connected to the Internet to download it. The Office Online Templates section contains a number of icons, which represents various categories of templates. Click an icon, and you’ll see the available templates. When you select a template thumbnail, you can see a preview in the right panel.
These template data is available online at the Microsoft server. When you select the template and click on it, it will download the template data from Microsoft server and opens it as shown below.