Velocity, in Big data means that data is being generated very fast, it also, refers to the speed of storing data and analyzing it, usually, the data used to get generated by people, but now we have social media, a security cameras at airports, sensors, smartphones, smart wearable devices like Apple watch and Samsung GEAR, The flow of data is huge and continuous.This real-time data can help researchers and businesses make valuable decisions that provide strategic competitive advantages and ROI (Return on investment).
You can see the speed of data being generated in real time by visiting the website: