A while ago, Google quietly added a new feature to its search arsenal.
Search by Image allows you to use pictures rather than keywords when looking for something. The results page typically displays:
- Links to where the picture can be found
- More info on that image
- Visually similar images
Search by Image is located at http://images.google.com and at the top of your Google Search page (“Images”). All you have to do is click the camera icon in the search box and follow instructions.
When you search by image, your results will look different than your normal Images or Web results page. The biggest difference is that your results can include non-image results like webpages that seem relevant to the image that you searched for.
(Source: Google Support)