Jekyll files have frontmatter metadata - it always starts and ends with ---, followed by any HTML or markdown content. Contrast with YAML file which only have one --- or none.

  • Simple: 
      ---
  title: My title
  description: My description
  ---
  • Complex 
      ---
  title: My title
  description: My description
  my_list:
      - A
      - B
      - C
  my_hash:
      a: 1
      b: 2
      c: 3
  deeper_nesting:
      foo: [100, 200, 300]
      bar:
          - 400
          - 500
          - 600
  ---

Comments can be added as:

---
title: Title
# Comment
---