Google adsense header

If you want somthing like this : stefanvblog.com

Just go to you header.php and put you adsense ad code above

<img src=”https://www.thehealthycollective.com/wp-content/uploads/2013/11/header3.png&#8221; alt=”The Healthy Collective” title=”The Healthy Collective”>

I’m doing that, but it doesn’t seem to be showing up, no matter where I put it in my header.php file.