As modern applications are often no longer tied to their underlying infrastructure, consist of numerous loosely coupled microservices, and can rapidly move and scale, corporate IT needs urgent help to understand and prioritize the potential impact of the yellow and red lights on their monitoring dashboards. This is where observability must come in, in place of traditional monitoring, to save the day. While monitoring is a mostly static discipline based on the collection of predefined metrics and logs—often separate from applications, infrastructure, and services to detect anomalies or failures—observability provides deeper insights into the key factors influencing application performance and resilience. [...Less]