Which AWS service evaluates your account by using checks for optimization and security improvements?

AWS Trusted Advisor is a valuable service that evaluates your AWS account's configuration to identify areas for optimization and security enhancements. It performs a set of best-practice checks across five categories: cost optimization, performance, security, fault tolerance, and service limits. This enables AWS users to receive real-time guidance on how to improve their account environments.

Trusted Advisor provides actionable recommendations based on best practices, which can help in increasing security posture by identifying things like overly permissive security groups, or opportunities to enable multi-factor authentication for higher security. The insights it provides can lead to efficient resource use and cost savings while ensuring that your infrastructure remains secure and compliant.

Despite the utility of services like AWS CloudFormation, AWS Config, and AWS CloudTrail, they serve different purposes. CloudFormation focuses on infrastructure as code to automate resource deployment. AWS Config provides a way to assess, audit, and evaluate the configurations of your AWS resources, while AWS CloudTrail is primarily for logging and monitoring account activity. Each of these services is significant within its own domain, but they do not provide the comprehensive evaluation aimed at optimization and security improvements that AWS Trusted Advisor offers.