Keeping an eye (or three) on your AdWords competitorsDaniel Gilbert
We all love to know what our competitors are up to. We shouldn’t care that much — we should probably just get on with being the best. But we just can’t help ourselves.
The best (and only empirical) source of competitor data is the AdWords Auctions Insights report. The only problem with this report is that it’s not easy to see changes over time, you can’t do any filtering, and you can’t add in any of your own performance data to see how competitor changes affected anything. And it can’t be pulled automatically, even after it’s been available for four years.