The question: "How much of a performance gain can I expect with good manual tuning?" I decided not to answer the exact question and suggest an alternative to manual tuning.
Google wants you to use Target CPA bidding. Is it right for lead generation campaigns? Read on to find out.
Centaurs - human+computer teams will outperform and replace AdWords agencies that rely on human power alone. Here are four ways to enhance your AdWords powers with automation.