Artbreeder is an online platform that uses artificial intelligence (AI) to generate new images by blending existing ones. It essentially allows users to create unique artworks by mixing and evolving different visual elements such as photographs, illustrations, and paintings. The AI algorithm behind Artbreeder utilizes techniques like generative adversarial networks (GANs) to learn from and interpret the input images, enabling users to manipulate various aspects like colors, shapes, textures, and styles.