The Arch User Repository (AUR) is a community-driven repository for Arch Linux users. It contains package descriptions (PKGBUILDs) that allow you to compile a package from source with makepkg and then install it via pacman.[1]
The AUR also has its own voting system. All packages are eligible for adoption by a Package Maintainer for inclusion in the extra repository, and the vote count is one of the considerations in that process. Packages that enter the extra repository can be directly installed with pacman.[1]
- ↑ 1.0 1.1 "Arch User Repository". Arch Linux.