The single item template is the content of your list items, for example if your list shows your projects, the template will contain the project title, the project description, etc. Creating a list item template is exactly like creating a standard page: add the components you want with the composer and you’re done. The difference here though is that usually the template does not contain any content, because it will be holding different for every item you use the template with. The template can be changed when you want, and existing items will not be deleted when doing so. Adding new items will be very easy, and the item’s admin is your template with the locked mode activated, which you can deactivate for the single item and change the default template’s content as you wish. This will ensure max flexibility.