By configuring display templates, you are controlling item display formatting. The main options are to let the result type determine the display options or to use a single template to format the display. Display templates show data from the managed properties of the result set, such as the following:
- File type
- Author
- Title
- Path
- Document Summary
- Preview image
Display templates are divided into three categories:
- Control display templates: This template contains the structure of the results, such as where headings go, numbering, and navigation buttons.
- Item display templates: The item display template contains managed properties whose data will be presented.
- Hover panel display templates: As the name indicates, the hover panel display template contains configuration information for the preview that's displayed when the mouse is hovered over the result.
For more information on configuring display templates beyond the MS-300 exam, please see https://docs.microsoft.com/en-us/sharepoint/use-result-types-and-display-templates.