Amazon Elastic Load Balancer (ELB) is a service that automatically distributes incoming application traffic across multiple Amazon EC2 instances, containers, or IP addresses. By using ELB, you can increase the availability and fault tolerance of your application, as well as scale it to meet the demands of your users.

Here are the steps you can follow to set up application load balancing in AWS:

1. Create an Amazon Elastic Load Balancer: To create an ELB, you'll need to specify the type of load balancer you want (Application Load Balancer, Network Load Balancer, or Classic Load Balancer), as well as the regions and Availability Zones where you want the load balancer to be deployed.

2. Configure the load balancer: You'll need to configure the settings for your ELB, including the protocol and port, the load balancer type (public or internal), and the listener rules that define how the load balancer should route traffic to your target group.

3. Create a target group: A target group is a group of Amazon EC2 instances, containers, or IP addresses that you want the load balancer to route traffic to. You'll need to specify the protocol and port that the target group listens on, as well as the health check settings that determine whether a target is considered healthy or unhealthy.

4. Register targets with the target group: To route traffic to your targets, you'll need to register them with the target group. This can be done manually, or you can use an AWS CloudFormation template or an AWS CodePipeline pipeline to automate the process.

5. Test the load balancer: Once you have set up your ELB and registered your targets, you can test the load balancer by sending traffic to it and verifying that it is routing traffic to your targets as expected.