API (Application Programming Interface) Development allows a set of standards, instructions, or requirements for one app to employ services or features of the other app. Hence, it is an app that establishes a connection between two or more apps.
For instance, when we access Candy Crush and it asks to get permission from Facebook, it does not ask us to enter the Facebook page instead it accesses all the data it requires from the Facebook server and allows us to keep on enjoying the game. This is the function of API.
A Vital Mode of Communication
An API is a means of communication between two different services or products and is the base of all apps. The data in one mobile app can be shared with other apps or platforms and simplify the user experience using API. APIs also disregard the purpose of building a separate app for communication from scratch. API development importance is realized and focused a lot by business leaders and app developers due to these factors.