decode url code example

Example 1: UTM URL

?utm_source=facebook&utm_medium=affiliate&utm_campaign=1337&utm_term=keyword&utm_content=adcopy

Example 2: clean urls

A other trick is that you make a new directory with the name for example user 
and a file in there calle index.html. 

The last thing is to link the page <a href="/user">To user</a>
The server will automatically use the index.html file in user which makes the
url look like: http://domain/user/