Elastic Block Store (EBS) is a block-level storage service provided by Amazon Web Services (AWS) that allows you to create and attach persistent block storage volumes to your Amazon Elastic Compute Cloud (EC2) instances. It provides highly available and durable block-level storage volumes that can be used with Amazon EC2 instances to store data.
EBS volumes are replicated within an Availability Zone (AZ) to provide redundancy and durability. You can also take snapshots of EBS volumes, which are stored in Amazon S3, to provide a backup of your data. EBS volumes can be attached to EC2 instances as block devices, allowing you to use them as a hard drive or to store data for databases, file systems, and other applications.