The Arch repos are completely different from the AUR. The Arch repos are officially maintained and tested. The AUR is where anyone can go upload a little pkgbuild script to make building and installing an arbitrary package as easy as possible.
Arch’s package manager (pacman) does not work with the AUR. The AUR is basically a glorified pastebin. It’s a convenience for people who know what they’re doing, but you should not go downloading and executing files at random from there. Arch explicitly warns against doing this, and deliberately does not ship with any easy way to do this.
The Arch repos are completely different from the AUR. The Arch repos are officially maintained and tested. The AUR is where anyone can go upload a little pkgbuild script to make building and installing an arbitrary package as easy as possible.
Arch’s package manager (pacman) does not work with the AUR. The AUR is basically a glorified pastebin. It’s a convenience for people who know what they’re doing, but you should not go downloading and executing files at random from there. Arch explicitly warns against doing this, and deliberately does not ship with any easy way to do this.