What method involves testing two different versions of something, like a web page, to see which one works better?

The method described is called A/B testing. A/B testing is a controlled experiment that compares two distinct versions of something, such as a web page, an application feature, or an email, to objectively determine which version performs better based on specific metrics. In this process, one version is designated as the "control," which is typically the existing or original version. The other version is the "variation," which incorporates a specific change or set of changes intended to improve performance. For instance, the control might be a web page with a blue call....