By Alvin Alexander. Last updated: May 30, 2015
When you’re working with a large Markdown document it’s nice to be able to include comments inside your Markdown text. You can do this by putting your comments inside HTML comment tags:
<!--- your comment goes here and here -->
I found this tip here on SO, where the author suggests using triple dashes so your comments will be safe when your Markdown is used with other tools like Pandoc.