JSON
JSON (JavaScript Object Notation) is a lightweight, text-based data interchange format that is easy for humans to read and write, and easy for machines to parse and generate. It is based on a subset of the JavaScript programming language and is commonly used to transmit data between a server and web application, as well as for configuration files and APIs. JSON represents data as key-value pairs and arrays, making it highly versatile for structured data exchange.
Developers should learn JSON because it is the de facto standard for data exchange in web development, APIs, and modern applications, due to its simplicity, widespread support across programming languages, and compatibility with RESTful services. It is essential for working with web APIs, storing configuration data, and enabling communication between different systems or microservices, especially in scenarios like mobile app backends, IoT devices, and cloud-based applications.