This guide provides detailed instructions on how to use Datadog to monitor the performance of Django applications and their associated technologies such as PostgreSQL, NGINX, and Gunicorn. It covers installation and configuration of the Datadog Agent, enabling APM tracing for Python applications, integrating with PostgreSQL, NGINX, and Gunicorn, gathering custom metrics and events, and creating Django-specific dashboards. The guide also demonstrates how to use Datadog's features to troubleshoot performance issues in a Django application.