# Zones

*Zones* are collections of [systems](/key-concepts/systems.md). A system can be tagged as a member of any number of zones.

![Zones have settings and a collection of systems.](/files/-LZZ3h3uyjW3MAURDd1v)

They serve two main purposes:

1. Logical groupings of systems with common traits (such as those in the same building, or of the same basic type).
2. A point to define settings that compose across systems.


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