Nowadays a lot of images contain GPS data. This data are useful in order to remember the exact position where a photo was taken. Those data are used by social networks to suggest you a location for your image.
GPS data can be very useful also during a digital investigation, because they can give you a lot of information about the place where the picture was shoot.
With imago https://github.com/redaelli/imago-forensics (a python tool that I made) extracting GPS data from JPEG can be very easy and fast.