Jamie Smith tells marketers how to double their campaign's click-through rate with a scientific AdWords A/B test on ad copy. He walks through updating ad copy optimization settings, writing ad copy ...

Learn how A/B testing and multivariate testing impact SEO and 8 tips to improve your tests and processes to maximize your site's SEO performance. To be successful in SEO, we need to have an ...

Split tests (A/B test) are a critical element of running successful PPC campaigns. Learn how to set them up and get actionable insights. Split tests (A/B tests) are crucial to long-term PPC success ...

Opinions expressed by Entrepreneur contributors are their own. Scientists would never push a drug to market without testing it to make sure it is effective; a similar principle should be applied to ...