modifying the following files:
content-single-forum.php
content-archive-forum.php
content-archive-topic.php
each Ad to each place
<!-- start of Adsense -->
<script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script>
<!-- before_bbp_content -->
<ins class="adsbygoogle"
style="display:block"
data-ad-client="ca-pub-9253013040120592"
data-ad-slot="4550524535"
data-ad-format="auto"
data-full-width-responsive="true"></ins>
<script>
(adsbygoogle = window.adsbygoogle || []).push({});
</script>
<!-- end of Adsense -->