According to the Google Image Labeler web page:
You'll be randomly paired with a partner who's online and using the feature. Over a 90-second period, you and your partner will be shown the same set of images and asked to provide as many labels as possible to describe each image you see. When your label matches your partner's label, you'll earn some points and move on to the next image until time runs out. After time expires, you can explore the images you've seen and the websites where those images were found. And we'll show you the points you've earned throughout the sessionUsing Crowdsourcing, Google will use Internet-based volunteers to categorize the image database in about two months. The process will be cost free for Google. So if you have 90 seconds to spare, visit Google Image Labeler.
It is slightly addicting. Try it.
Tags: image labeler, label images game, google images, label images