This tutorial walks through the complete process of using Zenfolio's product builder feature. The video demonstrates how to access the product builder from the selling tab, create new product templates using presets (focusing on greeting cards as an example), and customize designs with layers, text, and image placeholders. It covers key features like watermarking, layer management similar to Photoshop, switching between front and back designs, and adding design elements. The tutorial also shows how to preview templates in galleries to see the customer experience, and concludes with instructions on adding finished templates to price lists to make them available for sale to clients. The video emphasizes that product builder is designed for photographers, particularly those serving school and sports markets, and highlights its power and flexibility for creating customizable products.