HTML5 Canvas is an element in HTML that provides a space on a web page where you can draw graphics, animations, and render images dynamically using JavaScript. It allows developers to create 2D shapes, lines, text, and complex visualizations, such as charts or games, directly within the web browser. The Canvas element is highly versatile, enabling pixel-based control for graphic rendering, making it popular for interactive web applications. It is supported across modern browsers and offers methods for drawing, transforming, and manipulating images and shapes efficiently.