Well when your a posting a link you first click on this button 

  A window will then open asking "What name should be shown."  In this example Thunder used 
 HERE.  You then click OK.  Another window opens and you then type in the URL  [link address]  then click ok again.
When the message comes up on the screen instead of just showing the URL it shows, in this example, 
 HERE.  
I usually when provind a link will use the words CLICK ME or CLICK HERE
Hope that helped ya.
POST EDIT:-  Looks like Thunder got in while I was typing.  Quick on the keys there Thunder.;39