JSON (JavaScript Object Notation) is a widely used and popular format for structuring and exchanging data. It offers a lightweight, human-readable, and easy-to-parse way of representing information. JSON is commonly used in a variety of applications, such as web services, configuration files, and data storage. The basic structure of JSON is a collection of key-value pairs. Each key is a string, and its corresponding value can be a string, number, boolean, null, another JSON object, or an array of values. Here`s an example of a simple JSON object: In this example, we have three key-value pairs: name, age, and city. The keys are enclosed in double quotes, and the values can be of different data types. JSON arrays are used to store an ordered list of values. Here`s an example of a JSON array: In this case, fruits is the key, and its value is an array containing three strings. JSON is a flexible and versatile format that is commonly used in web development for data exchange between the server and client, as well as for configuring various applications and services. It is easy to understand, which makes it a popular choice for both developers and machines to work with structured data.