FirstSpawnX is a Minecraft plugin that sets a central spawn point for all players. Using the /spawn command, players can teleport to the main spawn, which is set by an admin with /spawn set. Admins can also reload the plugin's configuration using /spawn reload. Additional commands include /spawn help for information and /spawn <player> to teleport another player to the spawn. The plugin ensures that every time a player joins the server, they are teleported to this set spawn location, ignoring their previous position.