I've been a heavy Adwords advertiser for over 10 years. Since November I've seen significant declines in the "value" of my Adwords traffic. While my natural search conversion rates are going way up, my paid conversion rates via Adwords are plummeting.
At first I thought it had to be click fraud, but an audit of IP addresses and user activity did not turn up much of significance.
I've always thought of Google traffic as being of the highest quality. I'm in shock that they would do something that would so degrade their quality? I'm just going to keep lowering my bids, so any revenue gains Google makes by loosening quality standards seems to have short term benefit at best?
I'm curious what others are experiencing? How is the quality of your Adwords traffic?