Banco Itaú, the largest bank in Latin America, manages its extensive digital operations by tracking 1.5 billion daily metrics using a combination of on-premises data centers and AWS, facilitated by Grafana and other observability tools. With 16,000 technology employees and 15,000 engineers, the bank has built an observability platform as a service to enable rapid response to issues, making use of Prometheus, Thanos, Splunk, Yaeger, and AppDynamics for monitoring and performance analysis. This system, which includes over 500 Grafana organizations and approximately 4,500 dashboards, allows for comprehensive data visualization and incident response. As Banco Itaú transitions half of its infrastructure to the cloud, they are using Grafana to monitor digital channels and ensure seamless customer experiences, while also planning to adopt SLIs and SLOs and develop a unified monitoring interface. The bank's proactive approach in observability and collaboration with AWS aims to mitigate incidents, improve resilience, and support evolving customer needs in an increasingly digital banking environment.