A "Shared Object" is a data structure used in programming, particularly in environments like Adobe Flash and ActionScript. It allows different parts of an application or multiple applications to store and retrieve data in a centralized way. This makes it easier to manage user preferences, game scores, or any other data that needs to be accessed by various components. Shared Objects can be stored locally on a user's device or on a server, depending on the application's needs. They are similar to cookies in web development but can hold more complex data types, such as arrays and objects, making them versatile for developers.