2f333d6f_UX_Techniques__UX_Mastery___Technique
[What It Is] Good for testing new or experimental features before releasing them to all customers. [When To Use It] Design,Research [How To Use It] Give one version of a page or feature to some customers; give another to the rest. Measure the performance of each to see which was more successful. [Technique] 
A/B Testing
UX Techniques -UX Mastery 
Technique