netmeg - 3:35 pm on Jan 24, 2012 (gmt 0)
Targeting just isn't that easy anymore. Because of the interest based ad stuff, and personalization, you cannot tell what your users are seeing. There's no reason to necessarily think what you see is what they see. You can use the tags, but there's no way to know if they're really working.
Contextual advertising in 2012 seems like it's trying to be more contextual to the user browsing your site than the actual content of your site. Since Google is all about numbers, I suspect that it is probably working out for them across a majority of the sites out there. But for some of us on the fringes, not so much. I have sites where my CTR has gone way up, and some where it has gone way down.