What is the difference between S3 and EBS?

S3 is object storage — stores files as objects with metadata, accessed via HTTP/HTTPS, virtually unlimited capacity, 11 nines durability, ideal for static content, backups, data lakes. EBS is block storage — behaves like a hard drive attached to an EC2 instance, supports file systems and databases, exists within a single AZ. Use S3 for unstructured data and EBS for data that needs frequent read/write operations with low latency.