How to bid on Two Broad Keywords

One less known aspect of keyword performance is the relationship between its performance in your account, versus its overall performance in all accounts using it. Whenever you start using a new keyword, its initial quality score takes into account its historical performance across all others accounts using is. In order to have the system weigh YOUR performance for that keyword, you need about 1000 exact impressions for that keyword. That's roughly the threshold when the AdWords system weighs your CTR, and not the historical CTR for that keyword. Now, if you go too broad, and use, for instance +levis +jeans as your keyword, the Quality Scores for that keyword will be your own only after 1000 impressions for exactly levis jeans . Not blue levis jeans , not buy blue levis jeans. And if the historical performance of levis jeans is not great, and if people search for levis jeans something more often than they search for levis jeans alone , you're stuck with that bad performance ...