Velocity

The rate at which data is generated or speed with which data is generated.

Popular examples for Velocity are,

Data captured in millisecond intervals

Social Media posts

Google Maps

Security Cam feeds/alerts

Alexas, Siris

Self-driving cars

Src: https://blogs.sap.com/2019/06/24/what-is-big-data-and-why-do-we-need-hadoop-for-big-data/