Google Lens is a tool that allows you to search for images based on their description. For example, if you were looking for a picture of a red apple with a bite taken out of it, you could simply write "red apple with a bite taken out of it" and Google Lens would show you a picture of an apple with a bite taken out of it. This is a very powerful tool that can be used for a variety of purposes, such as finding information online or searching for specific objects.