What is Colored Gesso and Why Use It ? A Ginger Snap Lesson

Colored Gesso can be found in so many brands of acrylic paint. In this quick Ginger Snap lesson, I explain when you might want to try it and what to expect. I answer the question is it better to paint with a colored gesso, add acrylic color to white gesso, or never use white gesso? Doesn't most canvas come with gesso already on it, so why do I want to add more? Can I paint it over already painted canvas? Is gesso a thickener to add more body to paint? Can I add paint to white gesso to color it myself?