This instance will automatically update to the latest pack version, every time you launch the game. It's very useful to make sure you have the same mods as the server, and is highly recommended over the Modrinth pack.
This should work on any launcher that supports MultiMC pack importing. To install on Prism, you can just drag the file in, or go to "create instance" and import. MultiMC probably works the same way. In ATLauncher, click "import" in the instances tab, set it to the downloaded file, and confirm. After that, you should be able to run it and it will download all the mods and configs automatically.