Pacman Overview - Manjaro
https://wiki.manjaro.org/index.php?title=Pacman_OverviewManjaro's package manager, Pamac ships with most Manjaro editions. All Manjaro editions include pacman, the package manager from upstream Arch Linux. Pacman includes some advanced features not found in Pamac. Key points to know: Pacman is already installed in Manjaro Linux by default Pacman is mainly developed/maintained by Arch Linux developers
Pamac - Manjaro
https://wiki.manjaro.org/index.php?title=PamacPamac is Manjaro's Package Manager. It is based on libalpm with AUR and Appstream support. It focuses on providing an easy to use interface while still providing a powerful set of features. Installing Pamac Pamac is pre-installed on many Manjaro Editions but if your system does not have it it can be easily installed.