"Tracking URLs allow you to track everything, from clicks/leads/customers generated from banner ads to Twitter tweets. You can even track offline ads by redirecting an easy-to-remember URL such as http://yoursite.com/promo to the tracking URL. Never skimp on using a tracking URL because it adds an extra step. The extra 2 minutes it takes will let you determine which of your marketing campaigns aren't worth weeks of your time."

- Diana Freedman