"Did you know that your photos contain hidden information, including the GPS coordinates of the location they were taken at, the date and time, camera shutter setting details, and possibly even the name of the program you used to edit them? This type of metadata can be useful, but you may want to remove it from your photos before sharing them online.
Cameras — both standalone digital cameras and smartphone cameras — add this metadata to the photo when they create it. Software programs may also update the metadata later, noting what software was used to edit the photo. You can easily view this metadata and erase it."