AWS service scope falls into 3 categories:
Global service: A service configured & deployed globally. Eg. Route 53, IAM, CloudFront, SES
Regionals service: A service configured & deployed regionally. Multi-AZ RDS deployment, ELB, Auto-scaling, S3, DynamoDB
Zonal service: A service configured & deployed in a single zone. EC2
AWS service scope is an important consideration when designing solutions architectures. It affects application scalability, availability, performance, operational efficiency, cost & regulatory compliance.
For your convenience this is also available on YouTube at: AWS Service Scope
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