Your First n8n Workflow Variables & Expressions Explained (Day 5 of 30-Day AI Automation Challenge)

Description

Day 5 of the 30 Day AI Automation Challenge is where automation becomes intelligent. In this lesson, you build your first real n8n workflow and learn how variables and expressions control behaviour. We cover the difference between static and dynamic data, how to drag variables between nodes, and how expressions actually work behind the scenes. You will also learn how to use JSON data with if logic, the $json syntax, and how workflows make decisions based on real inputs like form submissions. By the end of this video, you will understand how data drives automation and why expressions are the foundation of scalable workflows. This is part of a free 30 Day AI Automation Challenge focused on practical n8n skills and real world use cases. Build along. Test everything. Share your progress in the comments.