This question originally appeared on Quora: When should A/B testing not be trusted to make decisions? Answer by Edwin Chen, Ex: math and linguistics at MIT, speech recognition at Microsoft Research, ...

I think it's safe to say that by about 2010, email marketing was a full-fledged marketing tactic. If your business wasn't using it to engage with consumers, then you may have been missing out on ...

Now imagine doing any of these things on a smartphone. Chances are it would take several false starts and -- if you were dedicated to the goal -- a lot of struggle before the job was done. It has ...

You've built your website for a reason, and in most cases, that is to sell something. But how can you be sure the website you have designed is converting all those visitors into actual sales? Maybe it ...

Opinions expressed by Entrepreneur contributors are their own. A/B testing is often regarded as one of the most important components of any marketing strategy. After all, you won’t truly know whether ...

Many nonprofits in low- and middle-income countries face a critical mismatch: urgent social problems demand rapid program iteration, yet organizations often wait years for externally-produced ...

Too often they measure meaningless variants, produce inconclusive results, and nothing comes from them. Of course, some A/B tests yield real, meaningful, actionable results. Those are the ones you ...

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 ...

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 ...