A/B Testing Definition A marketing experiment where two variations of a landing page, ad, email or other piece of online content are pitted against each other to determine which produces the highest conversion rate. A/B testing is the key to optimizing your marketing campaign. Conversion expert Michael Aagaard points out how A/B testing constantly forces marketers to confront reality and rethink our assumptions. “I don’t care much for best practices – I care about conversions. That’s why I test.” — @ContentVerve Tweet This Resources The Ultimate Guide to A/B Testing Smart Traffic VS A/B Testing: Which is Better for Me? Don't Fall Into the Trap of A/B Testing Minutiae Three Hard Truths About A/B Testing