Too Long; Didn't Read
<a href="https://medium.com/@Optimizely" data-anchor-type="2" data-user-id="317b31f4727" data-action-value="317b31f4727" data-action="show-user-card" data-action-type="hover" target="_blank">Optimizely</a> is a tool that lets you perform AB testing. Like all or most other client-side AB testing <a href="https://hackernoon.com/tagged/tools" target="_blank">tools</a>, it uses the following mechanism: