An A/B test is a method of comparing different versions of your websites or apps, and see which variation makes you more successful.
A/B tests are also known as experiments or split tests. In an A/B test you show two or more different variations to your users (visitors) and the variation that performs better wins. When a user enters the experiment a variation will be randomly chosen and the user will see this variation for all subsequent visits. Experimenting in this way lets you maximise your success. Read more about A/B Testing on the user guide.