An endpoint group is associated with a specific AWS Region. Endpoint groups include one or more endpoints in the Region.For each AWS Region that you want to direct traffic to, add one endpoint group. You can't have more than one endpoint group per Region.You can increase or reduce the percentage of traffic that would be otherwise directed to an endpoint group by adjusting a setting called a traffic dial. The traffic dial lets you easily do performance testing or blue/green deployment testing for new releases across different AWS Regions, for example.