By looking that you are here you most likely use Cardboard/Banner/some other weird bukkit + Fabric project (or just someone linked to it).
Don't do it, it will cause more harm/instabilities to your server than good. But let's start at the beginning.
Few definitions before we start:
- Bukkit - It means bukkit, spigot, paper and any forks of these,
- Cardboard - mod by IsaiahPatton that tries to port bukkit ecosystem to fabric.
- Banner - another mod trying to make plugins work with Fabric, similar to Cardboard.
- Fabric - a Minecraft modding platform, includes Fabric Loader and Fabric API, everything written in this gist also applies to Quilt.
- Mods - Mods designed for fabric and compatible platforms