Basic Syntax

Feature Description
Headings Headers
list Display the list of elements
Tables Tables
Comments comments are ignore by parsers.
Links Links
Blockquotes blockquotes
Images Images
Emphasis Emphasis Bold,Italic and strikethrough

Extended Syntax

Feature Description
GitHub GitHub uses it own syntax called GitHub flavoured markdown
rstudio R language own syntax for writing markdown content
slack Slacks syntax for writing content posts and chat
twitch Twitch syntax for writing content posts and chat
jira Markdown syntax for JIRA applications