The breed recognition feature works the same way other features in Google Lens work – you point the camera at a dog or a cat, or choose a picture from your gallery, and the software will make an analysis on the picture, providing you useful information in the process. Currently, when you point your camera at a dog, the app will show you its breed and some interesting facts about it. If it's unsure of the breed, Google Lens will show you a list of suggestions instead. No more "gray dog with long ears" Google searches.
Cat and dog recognition is just a small part of what Google has planned for Lens. The company announced back in February it would focus on improving the animal and plant recognition capabilities of the Google Lens.