Here are the following steps on how to properly insert the Nuffnang Leaderboard Ad (HTML Code) on Blogger/Blogspot.
Step 1
Copy the HTML Code for the Leaderboard Ad from Nuffnang

This is my personal blog wherein I can post anything that I want as long as it is good
Over thinking only makes things worse.
— WOW Facts Of Life (@WOWFactsOfLife) March 4, 2014