n8n is a self-hosted automation platform allowing users to connect apps, services, and APIs while maintaining flexibility. The guide demonstrates hosting n8n on Linux using Docker, creating workflows that pull data from Google Sheets, and using Llama for AI-powered responses. It highlights building simple to advanced workflows, showcasing integration with Discord and data processing capabilities. The video aims to empower users with automation tools for various tasks and suggests further exploration of n8n's features.