What more does your image contain?

What is Metadata ?
      Simply put, metadata is data about data. There are lots of information stored in metadata and these can be broadly classified into

1. Structural metadata - As the name implies, it simply deals with the set of values which describe how the data is structured. For examples how the content of a word file is formated. This data is cannot be discarded since it is this information which tells the application on how to interpret the data
2. Descriptive metadata - This has values like author of the document, when was it created and so on. Discarding this information doesn't create much impact if all you need is just the data
3. Administrative metadata - This mostly deals with intellectual property rights a.k.a copyright details. 

For photographers, adding copyright details in the tags is so simple. See the video for details

    Canon users can add the details in their camera itself, which means the minute you click your shutter, a copyright work is produced. A tutorial on how to do this can be found here

    For smartphone users, most of the phones have Geo-tagging enabled in them. I would suggest to enable the location tagging. In the long run, when you revisit these pictures and want to know where the image was taken, it would be really helpful. The tool which i have specified below points the exact location where the photo was taken in Google map

Apart from the GPS details, the file also contains what camera was used, what lens was used, what was the focal length at which the picture was shot, what was the amount of exposure, was the shot taken with the flash, was the picture Photoshopped, if so using which software(in which operating system) and many much more. Find about the other tags here.

Here's a link to a online tool which processes the metadata from the image and displays them in a readable format. More about the tool by its author can be found here.

A snapshot of the tool's output