Markdown is a way to build a website in easy way just using some non-alphabetic characters thrown in, like # or *.
Many technical writers find lots of benefits in using Markdown for their documentation. Some of these benefits are:
1-Text and links:
Code:
It's very easy to make some words **bold** and other words *italic* with Markdown. You can even [link to Google!](http://google.com)
Preview:
It’s very easy to make some words bold and other words italic with Markdown. You can even link to Google!
2-Images:
Code:

Preview:
There is more examples check the end of the page.
You can learn more about Markdown just click here.