The term "API" stands for "Application Programming Interface". It is a set of rules that help you create and integrate applications that can access the data from a different server or an application. Breaking this definition further, it is a medium for two different platforms to interact with each other without any glitches. How important is an API to a customer? APIs play a significant role in our daily routine. Right from booking a cab to one's workplace, making an online money transfer to a friend,