Initialize Google Mobile Ads SDK?

Question

Unity

Can anyone please explain in simple terms what is required to Initialize the Google Mobile Ads SDK. Here is a part of the text copied from one of the sites explaining the installation of advertising in the game on the unit and I do not understand what to do with this code.

Initialize the Google Mobile Ads SDK
Before loading ads, initialize the mobile ads SDK by calling MobileAds.Initialize() with an Action callback. This only needs to be done once, ideally at application startup.

using GoogleMobileAds.Api;
using System.Collections.Generic;
...
public class GoogleMobileAdsDemoScript : MonoBehaviour
{
...
public void Start()
{
// Initialize the Mobile Ads SDK.
MobileAds.Initialize((initStatus) =>
{
// SDK initialization is complete
});
...
}
}