---
title: Advanced topics
description: Adding additional context, Custom instrumentation. 
url: https://www.elastic.co/elastic/docs-builder/docs/3016/reference/apm/agents/ruby/advanced-topics
products:
  - APM Agent
  - APM Ruby Agent
applies_to:
  - Serverless Observability projects: Generally available
  - Elastic Stack: Generally available
  - Application Performance Monitoring Agent for Ruby: Generally available
---

# Advanced topics
- [Adding additional context](https://www.elastic.co/elastic/docs-builder/docs/3016/reference/apm/agents/ruby/context)
- [Custom instrumentation](https://www.elastic.co/elastic/docs-builder/docs/3016/reference/apm/agents/ruby/custom-instrumentation)