hi
this is the problem i am facing now
i hope you watch the full video
to tell me what i did wrong and what i need to do ?
that is it
i want to add admob plugin to my game and appear advertisements
but errors every where
watch video
and help me thanks 
???
you have to import the file.unitypackage. Do not copy only 2 files from his project.
p/s: i created another admob plug-in: http://forum.unity3d.com/threads/236156-Admob-Unity-Plug-in-use-Google-Play-Services-support-Interstitial
so if i download it u will help me to make ads on my game ?
just follow the tutorial. you will make it