What Does JavaScript Object Notation (JSON) Mean?

JavaScript Object Notation (JSON) is an open standard data exchange format based on a JavaScript syntax subset. JSON is text-based, lightweight, and generally considered easily readable/writeable.

Techopedia Explains JavaScript Object Notation (JSON)

JSON is preferred by some over XML as a data exchange format because it is less verbose, works quickly, reduces data size and simplifies document processing. It is used extensively in web development, especially because it seamlessly transfers information between potentially incompatible technologies. For example, it could involve a Java application running on a UNIX box or a C# application running on Windows.