Just how big is Big Data?

Big Data started with algorithms helpfully scouring vast amounts of data to find patterns. These days it feels a bit like Big Brother. Using machine learning and AI to tweak algorithms, companies are now able to deliver profound insights from datasets once considered impossible to compile. This collection and analysis has expanded so rapidly, it's pushing data holders off any existing ethical framework or map. Facing very little scrutiny, companies have been left on their own to establish right and wrong in this space.