Definition: graphic image stored digitally using small numbers of standardized graphic file formats.
People can recognized Graphic Formats by looking at the end of the file's name. The most famous ones are .GIF, .JPEG, .BMP and .PNG. These are examples of a Raster image which are files that are made up of pixels and enlarging these types of files can cause the image to become blurry. The other type is a Vector image and they are made up by using math calculations so if you enlarge those images it wont loose its clarity.
one example is displayed below that is a .GIF graphic format. My favorite type of Graphic formats; there like quick animated pictures.