What is Amazon Elastic Block Store (EBS) Service.
Amazon Elastic Block Store (Amazon EBS) is a block level storage volumes for EC2 instances. Its like a hard drive to the EC2 Instance. You can mount multiple EBS volumes to your instances.
Why EBS is used.
Amazon Elastic Block Store (Amazon EBS) is used as a primary storage to your EC2 Instance. The instance OS, applications are stored in EBS volume. The volumes can be dynamically attached, detached and scaled with any EC2 instance, just like a physical block storage drive