Context
A cloud bill becomes more useful when the team can connect it to the workloads and decisions behind it. Begin with consistent resource naming, ownership and tagging.
Separate environments where practical and review resources that are no longer needed. Development systems, unattached storage and forgotten test services can be easy to overlook.
Review usage patterns before changing capacity. Averages can hide peaks, and a smaller instance is not an improvement if it creates unreliable behavior. Check performance and business requirements together.
Build cost reviews into operations. Record changes and their expected effect so the team can compare assumptions with actual usage over time.