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 language-independent but uses conventions familiar to programmers of the C-family of languages, including C, C++, C#, Java, JavaScript, Perl, Python, and many others. JSON is commonly used for transmitting data in web applications, such as between a server and a web client, and for configuration files.
Developers should learn JSON because it is a standard format for APIs, configuration files, and data storage in modern web and mobile applications. It is essential for working with RESTful APIs, where data is often exchanged in JSON format, and for tools like NoSQL databases (e.g., MongoDB) that store data as JSON-like documents. JSON's simplicity and widespread support across programming languages make it a go-to choice for data serialization and interoperability.