Why can an ad block disappear?

Question

contextual advertising

Hey! I placed contextual advertising from Google on my website, but after a couple of hours it stopped being displayed, on the Google website in my office it is all ok. With what it can be connected.
The code:

$('#header_block').append("<div id='advert_block' title='рекламный блок'></div>");
$('#advert_block').append('<ins class="adsbygoogle" 
style="display:block" 
data-ad-client="ca-pub-5392160112991875" data-ad-slot="5374760940" data-ad-format="auto">
</ins>');
(adsbygoogle = window.adsbygoogle || []).push({});

Answer 1

Your targeting is not the same, technical difficulties, temporarily no ads, ad blockers. Wait a day or two and then look at the statistics on impressions in the interface.