With the Markdown block you can compose posts and comments with links, lists, and other styles using regular characters and punctuation marks. Markdown is used by writers and bloggers who want a quick and easy way to write rich text, without having to take their hands off the keyboard, and without learning a lot of complicated codes and shortcuts.
If you have Jetpack enabled but are not using blocks, take a look at our Markdown support document for more information.
Markdown is enabled by default when you set up Jetpack.
You can also enable Markdown for comments. To do that, go to Settings → Discussion → Comments in your dashboard, and then toggle the option labeled Enable Markdown use for comments. Choose Save Settings, and now visitors to your blog will be able to use Markdown when composing comments.
Adding the Markdown block
You can add a Markdown Block to any post or page, by selecting it from the Jetpack section of the block picker: