EC2 - Elastic Load Balancing (ELB)

Elastic Load Balancing automatically distributes your incoming traffic across multiple targets, such as EC2 instances, containers, and IP addresses, in one or more Availability Zones.
Elastic Load Balancing monitors the health of its registered targets, and routes traffic only to the healthy targets.
Elastic Load Balancing scales your load balancer capacity automatically in response to changes in incoming traffic.
Types are as below based on your implementation,
- Application Load Balancers
- Network Load Balancers
- Gateway Load Balancers
- Classic Load Balancers
Target Groups do work on similar line.