Google Adsense Loading?

Yes, I’m against loading. I’m just curious about this term if any experienced member knows this I just want to ask Why you should never do Adsense loading.

In my knowledge, a good blogger is doing and whenever I message him he asks about how my organic blogging is going off course it is not good and I’m not making a single penny for the last 1 year.

However, He always answers why you are doing blogging just do Adsense loading.

Yes I’m not in favour of adsense loading however just want to know more about it