System updates are improvements or fixes made to software or operating systems, such as those used in computers and smartphones. These updates can enhance performance, add new features, or address security vulnerabilities, ensuring that the system runs smoothly and safely. When a device receives a system update, it typically downloads the new software version and installs it automatically or with user approval. Regular updates help maintain the device's functionality and protect it from potential threats, making it essential for users to keep their systems up to date.