Doing a reverse image search allows you to find artist/photographer/creator information when you have nothing but an image itself to go by. Why would you want to do this kind of search?
Well, have you ever found a piece of art and wondered who made it but were unable to find the artist/photographer/creator's name? Have you ever found a visually stunning picture and wanted to find more like it? These are all very good reasons to do a reverse image search.
In Google Chrome, right click on the image, then click on Search image with Google (in Microsoft Edge, click on Search the web for image). Your search results will include images similar to or exactly the same as the original image.
TinEye Reverse Image Search is another great tool for tracking down the original source of an image. TinEye also lets you upload or copy/paste images from your computer.