Google Helps You Gauge Which Ads Work Best

"A better way to see what works best - Ad conversion tracking. The holy grail of marketing is a complete understanding of what part of the marketing mix is most effective for converting shoppers into buyers. Businesses large and small took a step closer to attaining that goal recently when Google introduced a new conversion tracking tool as part of the Google AdWords program. Advertisers can now determine which keywords they've targeted with their ads are leading to not only the most clicks, but the most actual sales."