Description : The .data() method is used to store and retrieve data associated with elements.
Answer :
The `.data()` method in jQuery is used to store and retrieve data associated with elements. For example,`$('#elementId').data('key', 'value');` stores the value `'value'` under the key `'key'`for the element withID`elementId`. You can then retrieve this data with`var value = $('#elementId').data('key');`. This method provides a convenient way to attach custom data to elements without altering the HTML attributes, and it ensures data persistence across DOM manipulations.