Do reverse image search online

A friend sends you an image in facebook messenger, WhatsApp, Twitter or on email and you want to verify the origin of the image you can do this with ReversePhotos - an online webapp which will do this for you.

You will download or save that image to your desktop then upload it to that online Webapp , the app will run through the google image database and do its magic to search for the original image. The app will also show which other sites have this similar image uploaded (quite impressive).