---
title: "Level 4 deep dives | Grafana Labs"
description: "Choose your Level 4 learning path"
---

> For a curated documentation index, see [llms.txt](/llms.txt). For the complete documentation index, see [llms-full.txt](/llms-full.txt).

## Ready to go deeper?

| Course                 | Description                                      | Status |
|------------------------|--------------------------------------------------|--------|
| Custom instrumentation | OpenTelemetry SDKs, custom spans, custom metrics | Future |

## Documentation

- [OpenTelemetry SDK docs](https://opentelemetry.io/docs/instrumentation/)
- [Custom metrics docs](https://grafana.com/docs/grafana-cloud/send-data/metrics/)

> **Alerting, SLOs, and dashboards for custom metrics?** Use the same techniques from Operational Practices. The tools are the same. Only the data source changes.

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**Congratulations! You’ve completed the four levels. Next, let’s cover operational practices that span all levels.**