Chrome OS is an operating system developed by Google that is designed primarily for use on Chromebooks. It is based on the Linux kernel and focuses on web applications and cloud storage, allowing users to access their files and programs through the internet. Unlike traditional operating systems, Chrome OS is lightweight and boots up quickly, making it ideal for users who primarily use their devices for browsing the web, streaming media, and using online productivity tools like Google Docs. It also features built-in security measures to protect against malware and other threats.