A ContentProvider is a component in the Android operating system that manages access to a structured set of data. It allows applications to share data with each other in a secure and organized manner. By using a ContentProvider, developers can define how data is stored, queried, updated, and deleted, making it easier to handle data across different applications. ContentProviders are commonly used for sharing data like contacts, images, or other media. They provide a standard interface for applications to interact with data, ensuring that data access is consistent and secure. This helps maintain data integrity while allowing multiple apps to access the same information.