the idea that everything that is now put in writing, done or spoken will forever exist. Similar to carbon footprint. That whatever you put on a computer, email, phone or other media will forever exist and be discoverable.
That it can all be editted, manipulated, cropped, photoshopped and used against you or for you depending on the motives at hand. The presence of cameras everywhere able to photograph someone's every move, GPS, satellites.
Dude, you are being google earthed and netprinted...