How to integrate AdMob to JavaScript project?

I can’t find how I can integrate AdMob to my game and use it. I found this manual https://github.com/chukong/cocos-docs/blob/master/manual/framework/html5/jsb/plugin-x/how-to-use-plugin-x-on-android/en.md. Nevertheless I have some troubles with it. After all manuals steps I can’t build Android project.

If this manual is right, then how I can use admob then? Where I can find some examples?