Google Image Search added a new feature that lets you group images by subject. Instead of showing images related to different topics in a single view, Google's image search engine finds the most relevant related searches and shows the top results for each category. For example, when you search for [dog], Google shows the results for [german shepherd], [golden retriever], [great dane], [pug dog], [boxer dog], [rottweiler dog], [border collie] and more. Unfortunately, the clusters for [cat] aren't that great: [funny cats], [cute cats], [cats and kittens], [fat cat], [lol cats].
"Sorting gives you a new way to start your search by exploring categories visually. If you need a particular image, like a picture of coffee for a presentation, sorting can help you hone in on exactly what you're looking for. Searching for broad topics sorted by subject, like the 1940s or Sydney, allows you to explore and learn visually," explains Google.
You only need to select "images" from the Google sidebar and click "sort by subject". By default, Google still sorts the results by relevance.