How and where did you insert ads on the site rumigration.com?

Question

Google Adsense

On the site rumigration.com, an advertisement from Google is inserted, the question is how exactly and where it was inserted. The admin panel looks like all the found plugins were put there and then try to find what they used.
Here is another topic on the problem https://support.google.com/adsense/thread/3915828?...
And they also write there:
You have an automated ads code inserted 4 times
and there should be only 1 (one) in the HEAD part
Questions A :
1. Automated ad code is something special? Is it not like 5 years ago when just one code in the header and another in the place to display? Has something changed?
2. What code is duplicated 4 times?
3. Through what to remove it, where can it be inserted?

Answer 1

you need a freelancer, boss (c)