Description: The Format String is a template used to define how log messages are structured and displayed in logging and observability systems. This technique allows developers and system administrators to customize the output of logs, facilitating the identification and analysis of events in applications and services. Through the Format String, different elements can be included such as the date and time, the severity level of the message (e.g., INFO, WARN, ERROR), the name of the module or component generating the log, and the message itself. This standardized structure not only improves the readability of logs but also allows for better integration with monitoring and analysis tools, which can process and filter logs more efficiently. The flexibility of the Format String allows it to adapt to the specific needs of various logging frameworks, making it an essential tool in the field of observability and logging, where clarity and precision of information are crucial for diagnosing and resolving issues in complex systems.