where to put adfly Full Page script

i have this script from adfly

<script type="text/javascript"> 
     var adfly_id = 3506998; 
     var adfly_advert = 'int'; 
    var exclude_domains = ['example.com', 'yoursite.com']; 
 </script> 
 <script src="https://cdn.adf.ly/js/link-converter.js"></script> 

discription says:
"Simply copy-and-paste the code below on to your webpage or blog and the links will be updated automatically - simple!"

so where to put that script?