SMP servers provide Minecraft players with an opportunity to create their own in-game universe. SMPs often involve established community rules and lore, created entirely by players within the server.
It's not an option I would recommend too much in the long run, because to play, that person will have to be connected and with the server running at all times. In other words, every time you want to ...
Minecraft SMPs are the hottest trend on YouTube these days. SMP servers like Dream SMP Legacy SMP, Hermitcraft, Empires SMP, and Scicraft have popularized the idea of survival multiplayer servers.