Each <Zone> is one travel node on the open-space map. id is the numeric zone id used by events and links, name is the internal node name, levelName is the 3D level that actually loads, minAccountRank gates entry, maxPlayers caps the instance, and the optional universe/tier/pressure/rank attributes tune conquest matchmaking for that node. Only change numbers you understand (minAccountRank, maxPlayers). Never reuse an id, and never put a _ow levelName into a battle queue levelsDesc.