Arch Linux is a lightweight and flexible Linux distribution that is designed for users who want to customize their operating system. It follows a rolling release model, meaning that users receive continuous updates rather than having to upgrade to a new version periodically. This allows for the latest software and features to be available without the need for major upgrades. The installation process of Arch Linux is manual, which gives users complete control over their system configuration. It uses the Pacman package manager for easy software installation and management. The distribution is known for its simplicity and minimalism, making it a popular choice among advanced users and developers.