From Data Never Sleeps, an infograph by domo.com:
Big data is not just some abstract concept used to inspire and mistify the IT crowd; it is the result of an avalanche of digital activity pulsating through cables and airwaves across the world. This data is being created every minute of the day through the most innocuous of online activity that many of us barely even notice. But with every website browsed, status shared, or photo uploaded, we leave digital trals that continually grow the hulking mass of big data.
Click on the image to see the full infographic.