#Markdown Markdown: Markdown is a way of styling text on a webpage, It can also give you the ability to control the display of the document formatting words adding images, and many great things.
some examples of the syntax:
-Bold Text: Bold.
-Italic Text: Italic.
-lists: - for list strat with a dash, * for list strat with a star, {1-9} for numbered listes .
-Images: 
-Code: Your Code
GFM(GitHub Flavored Markdown): it's a special version of Markdown used by Github.com which provides a n additional set of useful features, That will make your life easier when dealing with content on Github.com. some features of GitHub Flavored Markdown are only available in the descriptions and comments of Issues and Pull Requests, Such as @mentions and references to SHA-1 hashes.