An object is a great way to keep track of a bunch of related information. Additionally, the information contained in one object can be "inherited" by another. For example, imagine a program which represents cars. Other languages like PHP, Java, or C++ force the programmer to act as a manufacturer, providing a blueprint with every detail of how each vehicle's parts will work before it ever runs. But JavaScript lets you add and remove parts as needed, so you can have a Ferrari one second and a seaplane the next. And if at some point you particularly like the current arrangement, you can instantly make unlimited copies.