In this video, we will create Autoscaling groups. The load balancer is often used with the Autoscaler so that as the autoscaler performs horizontal scaling where more instances are added when needed and reduced when not needed, the load balancer can forward traffic to the available EC2 instances. Compared to horizontal scaling, vertical scaling is where a single server is used to serve the workload and capacity can only be increased through upgrade (i.e. increasing the CPU count or the size of RAM). The load balancer forwards traffic to the instances as provisioned by the autoscaler. It can be one EC2 instance, it can be 1000 EC2 instances.
