This lesson explains the concept of A/B testing. Although A/B testing is not the same as blue/green deployments, they are similar. Like blue/green deployments, A/B testing is used to compare two different versions of an application in order to find out which is more effective at engaging users. We can manage two versions of an application and the traffic flow to each using Route 53 and weighted routing. In this lesson, we’ll take a look at some of these techniques using the AWS Management Console, Route 53, and CloudFront.