What are web APIs?

Web APIs, or Application Programming Interfaces, are designed to facilitate communication between different software applications over the internet. They provide standardized methods and protocols that enable different systems to exchange data and functionality seamlessly. This is essential in modern software development, as it allows developers to leverage web services offered by other platforms or applications, enabling the creation of more complex and feature-rich applications.

In contrast to other options, which refer to specific functions or tools unrelated to the concept of web APIs, the focus on communication represents the core purpose of a web API. For instance, transferring local files to a server pertains more to file transfer protocols rather than standard API function. Similarly, tools for visualizing data are distinct from APIs, as they relate to data representation rather than data interaction between applications. Libraries for building mobile applications are also not directly relevant; while some mobile frameworks may utilize web APIs, they do not define what web APIs are or their function in software communication.