Spot Instances are a cost-effective solutions when consistent uptime of the instances is not an issue and continuous processing is not required.

AWS provides the requirements for the infrastructure and customer must provide their own control implementations within their use of services.

AWS Trusted Advisor provides optimization recommendations on several categories in AWS services and helps following best practices.

Elastic Load Balancing is an AWS service that ensures that load is distributed across a set of running instances - offered at 3 levels.

Edge Locations are where end users access AWS services with minimal latency, used mostly for serving content - such as Route53 or CloudFront.

An Availability Zone (AZ) is a datacenter owned and operated by AWS in which the AWS services run, within an AWS Region.

AWS Regions are geographically distinct locations, where the services are offered - Not all services are available in all regions.

AWS Session Manager enables access to EC2 instances without the need of a Key-Value pair, which comes with some advantages.