Modern Web Design with HTML5, CSS3, and JavaScript - Creating a Three-column Website

The video tutorial covers updating a navigation bar using flex for responsive design, creating a three-column layout using floats, and handling overflow issues. It also explains how to clear floats and adjust the design for different screen sizes. The tutorial provides a step-by-step guide on using CSS properties to achieve these tasks, with a focus on responsive web design techniques.

What new insight or understanding did you gain from this video?