You may place Google Adsense ads in several locations by using the Additional Content feature.
First make sure you’ve enabled Google Adsense scripts in Appearance → Customize → Additional Content → General.
Then put the ads code starting with ins
into one of the Additional Content fields:
<ins class="adsbygoogle"
style="display:block"
data-ad-client="ca-pub-1234567890"
data-ad-slot="1234567890"
data-ad-format="auto"></ins>
That’s it!