Cost optimization tools: AWS Trusted Advisor, AWS Compute Optimizer and rightsizing recommendations

Knowing what you spend is only the start; the next step is spending less without hurting performance. Most waste in AWS comes from resources that are bigger than they need to be, resources nobody uses any more, and steady workloads still paying On-Demand rates. AWS provides tools that analyze your account and point to specific savings. The exam tests which tool gives which kind of advice, and the idea of rightsizing: matching resource types and sizes to actual workload needs.