My idea is that server packs would be a set of plugins and worlds that can be used to improve your server's experience. Basically, a server pack is a folder containing a subfolder full of plugins and one full of worlds. You install a server pack by deleting your main plugin and world folders (or moving them away) and copying the server pack's subfolders' to the main directory. Now you would be able to play with the server pack's configuration, possibly improving your gameplay. I did make a small server pack but it is not ready yet. But basically, it added a few features from Minecraft PC.