JSON - the standard data format of websites
JSON can exist in the form of the object itself or as an array by storing several data types: object, table, string, numbers, boolean (false or true) and null. It gained its popularity due to its simplicity of use, which is why it has become the default data format. It can be used interchangeably with XML and CSV, and its MIME for email communication is application/json. It is closely related to the transfer of data between the server and the AJAX-based application, which is responsible for interaction with the user.