Pamac is Manjaro's Package Manager. Pamac 10 comes with a new software-mode, speed improvements, optimized DB interaction, and more.
Manjaro is a Linux distribution based on Arch Linux. It has a focus on user friendliness and the system itself work fully "out of the box".
Pacman is command line package management tool for Arch Linux. Let see how to use it to install, remove, update, and querying packages.