I read an interesting post just some days ago about Ads in Local Business. The site is horrible, but the content is good:
http://neilpatel.com/2016/12/15/we-analyzed-120000-google-ad...
http://neilpatel.com/2016/12/15/we-analyzed-120000-google-ad...
That's an understatement. I wonder how can a site, that is so designed not to make you read anything, say anything of value.
Rand Fishkin (the founder of Moz) on the other hand understands the material better and I think truly is a good guy that is trying to make the SEO market a better place. He does some really nifty whiteboard fridays.
Rand & Dr. Pete/moz in general is one of the best places, along with http://seobook.com/ for a more cynical perspective.