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• Metrics and Open Telemetry are used for observability and provide an API and SDK for instrumenting code and collecting telemetry data.
• The media provider is the API entry point for metrics, and meters and instruments are used to record measurements.
• Aggregation, temporality, and dimensions are important concepts in metrics.
• Async up down counters and gauges are two types of metric instruments that are used for different purposes.
• There is much more to learn about metrics and Open Telemetry, including customization options and different processors for transforming metrics data.
• The presentation provides references for further exploration and credits to the people who contributed to the content.