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Ec2 is:

• EC2 Instances are virtual machines (OS + Resources)
• EC2 Instances run on EC2 Hosts
• Shared Hosts (you share EC2 Hosts with other customer who use EC2), Dedicated Hosts: Soley for you but you pay for whole Host. It’s Shared by defualt.

EC2 instance’s storage is AZ specific meaning EBS on AZ-B cannot interact with EC2 that are on AZ-A.
EC2 instance is also AZ specific, you can’t natively move EC2 that are on AZ-A to AZ-B. There are way to migrate this tho.

What is EC2 Good for?

• Traditional OS+Application Compute
• Long-Running Compute
• Server style applications
• .. burst or steady-state load
• Monolithic application stacks
• Migrated application workloads or Disaster Recovery