Search on Google by using an Image

We search on Google by typing something but there is an other feature on Google.That is searching by using an image.You can see from what site this image is copied or you can see other images like that by uploading image.
Procedure:
To upload an image click on the small image icon in the Google's  search field  where we type , Image icon appears at the end of search box.
If you don't have an image icon on Google's search field simply open any image on Google , right click on image and select "Search Google for this image"

The image search open in a new Tab. Upload a new image by click on the small image icon.