JSON (JavaScript Object Notation) is a lightweight, text-based data format used for storing and exchanging data. It is easy for humans to read and write, and simple for machines to parse and generate. JSON is language-independent but widely supported across programming languages, making it a standard for data interchange in modern web development and APIs for the following reasons. * **Human-Readable and Simple** - JSON is structured and easy to understand, making it developer-friendly for both reading and debugging. * **Lightweight** - Its compact format reduces bandwidth usage, improving performance for data transfer in web and mobile applications. * **Interoperability** - JSON is supported by virtually all programming languages and platforms, ensuring seamless integration between systems. * **Easy to Parse** - Most languages have built-in functions or libraries (e.g., JSON.parse() in JavaScript) for parsing JSON data, simplifying processing and manipulation. * **Flexible Data Structures** - JSON supports key-value pairs, arrays, and nested objects, allowing representation of complex data structures. * **Compatibility with JavaScript** - Since JSON is based on JavaScript syntax, it integrates naturally with JavaScript applications, including front-end frameworks like React, Angular, and Vue.js. * **Standardization** - JSON is defined by RFC 8259 and ECMA-404, ensuring consistent usage across systems and applications. JSON is the preferred format for data exchange due to its simplicity, flexibility, and compatibility with modern programming languages and frameworks. Mobile applications were the initial driver of adoption for JSON, but it has spread much wider to the desktop, server, and every other aspect of API operations.