Have you ever wondered how Google Search by Image Works?
Back in 2011 Google announced a new way to find things on the Internet which meant that instead of searching Google for text keywords you can search for images.
How Google Search By Image Works
You will notice a camera icon on the far right side of the search bar where you enter the keyword text. If you drag an image onto the search bar the Google image search will use the image to find other images that are similar.
You can also copy and paste and image URL into the search bar and this will do the same job.