Unified observability signifies the possession of one consistent view over all the parts of a distributed system - applications, infrastructure, and services. With modern systems being spread over several clouds, microservices, and APIs, the only way to have such visibility is through open standards and distributed tracing. Standards such as OpenTelemetry not only make it easier to collect but also to correlate the telemetry data (logs, metrics, and traces) from various components.
Implementing a pre-defined logging format, like JSON, facilitates easy parsing and searching of logs, leading to quicker identification of issues by including timestamps, service names, log levels, and unique request IDs.