The JavaScript object, often referred to as 'obj', is a powerful tool for organizing and manipulating data in your code. By using the obj, you can create structured data that is easy to access and modify. To start using the obj, you can define a new object using the curly braces {} notation, like this: var myObj = {}. Then, you can add properties to your obj using key-value pairs like this: myObj.name = 'John'; myObj.age = 30;. You can also access and modify properties of the obj using dot notation, like this: var name = myObj.name; myObj.age = 31;. The obj also supports nested objects and arrays, allowing you to create complex data structures. When working with large amounts of related data, the obj can help you keep your code organized and efficient. Overall, the obj is a fundamental part of JavaScript programming and can greatly improve the functionality and organization of your code.