AWS Cloud Infrastructure is the collection of AWS services used to build, run, and manage applications in the cloud. It includes computing, storage, networking, databases, security, and monitoring services.
With AWS Cloud Infrastructure, you can use services like Amazon EC2, Amazon VPC, Amazon S3, Amazon RDS, IAM, Elastic Load Balancer (ELB), and CloudWatch to create secure, scalable, and highly available applications.
In simple words, AWS Cloud Infrastructure provides all the cloud resources needed to build, deploy, secure, and manage applications without owning physical hardware.