Metadata is a crucial aspect of information technology that has been in use since 1967, initially focused on finding physical locations of data and later expanding to include logical proxies like account IDs and named environments. Telemetry data, which represents a series of numbers, can be analyzed by comparing and contrasting like or unlike groups to make informed data-driven decisions. New Relic's standard agents group telemetry under a common application name and ID, but this is not sufficient for modern observability. Metadata is essential for finding entities and telemetry, visualizing entities and telemetry, routing and responding to workflows, planning activities, and reporting business KPIs. Tags can be used to automatically apply metadata, providing a simple way to view and interact with tags in New Relic's curated views or using the entity explorer. Custom attributes can capture specific characteristics of a user's experience or application state, but come with drawbacks such as managing them centrally and incuring additional telemetry ingest cost. Lookup tables can be used to upload CSV files that relate ad hoc lookups to existing telemetry, providing a flexible solution for organizations with varying metadata needs. A simple standard for entity metadata includes five tags: Environment, Region, Team, Code Owner, and Line of Business/Business Unit, which can be modified and extended by organizations to demonstrate the value of metadata in their organization.