A template is a dummy file or a sample arrangement that serves as a reference to start a new document or webpage. A template has a particular format to guide you through the eventual look and feel of the document or webpage so that you can make changes in it based on your preference. It only serves as a preset or model for others to copy from.
Templates to almost all kinds of documents, presentations, web designs, etc. are available freely on google these days, you may choose them based on design, color, theme or genre.