How to work with i-frame?

Question

contextual advertising

Greetings!
I'm going to post a link to my resource on the forum, the administrator wrote me the following phrase:

In all places, it is optimal to place your i-frame code for independent quick replacement of banners or texts and links by you yourself.

Tell me what do you mean? How to work with it? If possible, an example))

Answer 1

https://webref.ru/html/iframe with description and example.
You make a page for yourself, and he hosts it with an iframe