You might don’t know but Google has started providing more and more data to their advertiser. Now as an adwords advertiser you can actually see where your ads are running and how they performing. So, if any site that is not providing good ROI to you or your client then you will instantly stop showing your ads on that site.
I mentioned t this because if you have made any site or planning to start a site just for making money via adsense then its not going to work as good as it used to. So, in order to make money from adsense or any other form of advertising these days you need to provide the quality content. You should focus more on your content rather than building links.
The other benefit of generating the quality content is that it will gain backlinks for your site automatically, as everyone likes to link with quality content.
Back to track, so in order provide the good ROI to your advertiser you need the quality traffic on your site and you can only get the quality traffic by providing the value in your content. I think game is changing now, if it has not changed completely therefore to make money with adesnse you need to rely on quality content.
