Hey. I got this code from Google to input into my site but my website keeps rejecting it. What can I do to make it accepted?

Question

This is the code I got from Google
<script async src="//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script>
<script>
(adsbygoogle = window.adsbygoogle || []).push({
google_ad_client: "ca-pub-xxxxxxxxxxxxxxxx",
enable_page_level_ads: true
});
</script>
I don't know the language it's in. Can someone help me fix it? The X's were covered by me by the way.

Answer 1

//This is javascript, open index. html and put it between head tag, there should be no problem