A template is a predesigned set of elements for creating a document—a layout, placeholder text and images, and so on. Placeholders give you an idea of what a document created with this template might look like when you use its text and object styles. You choose a template from the template chooser when you create a new document.
You can modify the template however you like, but you can’t switch to a different template after you begin creating your document.
Some placeholder text is written in lorem ipsum, Latin text that is scrambled so it has no meaning. When you add your own text, it appears in the language you use for your computer or for any language-specific input devices.