Googles Image Search allows users to filter by license type, in other words, to search for images whose creators have granted permission for reuse. Select Tools located to the right of the search bar to enable this feature.
In addition to being able to search for images, Google features an option to reverse search using a link or an image file. This can be invaluable in locating the source of an image found elsewhere or finding a similar image which is licensed for reuse.
