Google today launched image previews of related searches when you hover over a related image. Hovering will open a dark gray box with previews of three to five images from the related searches – no click-through required.
For example when you search Greece in Google Images additional search terms are suggested (Green Athens, Greece Maps, Greece beeches etc) at the top of the page. When you hover over these related keywords, additional images are suggested to help inform your search.
This update is rolling out globally over the coming weeks, Google said in a blog post.