What is the purpose of AWS Trusted Advisor?

AWS Trusted Advisor serves a crucial role by providing real-time guidance to help users optimize their AWS resources and make the most out of their AWS environment. It offers insights based on best practices to improve the performance, security, and cost-effectiveness of the resources deployed in AWS. Trusted Advisor evaluates the user's account against several checks in five categories: cost optimization, performance, security, fault tolerance, and service limits. Through these checks, it identifies opportunities to provision resources more efficiently, suggest cost-saving measures, and enhance the overall system architecture.

In contrast, the other options reflect different functionalities within AWS. Managing server capacity pertains more to services like Auto Scaling or AWS Managed Services, which handle the automatic scaling of resources based on demand. Monitoring billing and usage is typically managed through AWS Billing Dashboard or tools such as AWS Cost Explorer, which helps users keep track of their spending. Lastly, controlling access to AWS resources is primarily handled by AWS Identity and Access Management (IAM), which allows users to manage permissions, roles, and policies for secure access to their resources. Each of these serve distinct purposes that do not align with the primary function of AWS Trusted Advisor.