Debian is a free and open-source operating system based on the Linux kernel. - Because it's open source, Debian's source code is accessible to everyone and can be modified. This allows users to understand how the system works, customize it, or create their own software. - It is known for its reliability. A large community of supporters constantly works to improve Debian and ensure its security. - It has a wide variety of applications. Web browsers, office suites, games, database management systems, and many more applications can be easily installed using Debian's package manager. Debian offers a suitable Linux distribution for both experienced users and beginners.