Footprinting as a term, I did not know of until yesterday. However it does what it says on the tin; depending on your preference. In a computing world it is used in reference to deep stuff such as DNS and other IP data from the ‘system’

Outside of the tech world footprinting is an audit that provides an assessment of substances, so a footprint could show the carbon emissions that a mobile phone manufacturer is responsible for in a 6-month period across its total organisation, or the carbon impact from the manufacture of a single handset. More and image from

Why is this interesting to My Digital Footprint – more data. As I expand the data input model from just your digital data, footprinting (outside tech) could give you more information on the consequences of what you have done – that does become interesting.