According to this issue:
https://instantview.telegram.org/contest/telegraf.rs/template36/issue6/

Iframe you see as ad, isn't it?

But, what about all content?
All article is promo article from website which about financial investment:

Iframe, or banner ad as you see that, is linked to:
https://www.kapitalrs.com/minilps/rs/kako-pametno-investirati/?tag=ebook&tag1=banner@eurusdbook

Check these paragraphs and links:
Besplatnu e-brošuru "Kako pametno investirati" preuzmite ovde.

Linked to same page:
https://www.kapitalrs.com/minilps/rs/kako-pametno-investirati/?tag=ebook&tag1=telegraf@paladijum

This paragraphs are ads also.

@admins check again and fix mistake.

I undarstand that this isn't your native language, but check again.
Read all content, check links, source etc. Translate if you need.

https://translate.google.com/translate?hl=&sl=sr&tl=en&u=https%3A%2F%2Fwww.telegraf.rs%2Fvesti%2Fekonomija%2F3047648-paladijum-vredniji-od-zlata