How can I use Admob in a MonoGame iOS project?

How can I add the Google Mobile Ads SDK to my MonoGame iOS project? I created a new iOS solution in Xamarin but I don’t know how to add the SDK to my project.

Google Ads
I found this article but I don’t know how to use CocoaPods. How can I add the SDK to my project without using CocoaPods?

I want to use Admob in my project so that I can show interstitial ads in my game.

edit: It works now, I added the Xamarin.Firebase.iOS.AbMob nuget package to my project.
nuget package