Templates are forms that have already been created and are ready to be filled out.
If you have a form that you keep using for a business, you can save it as a template. To save it as a template, go to edit mode of the form. Then, by clicking file, you'll see the option "Save As a Template". By clicking, a window will pop up that will let you name your template, edit the description, as well as create its own "collection". Meaning, if you were to go to the gallery, there will be folder with the collection of the template.