Networks can go cross-chain because of Wormhole with different levels of integration.
A fully integrated chain can use cross-chain dapps to send and receive tokens and NFTs. It can also publish and verify messages to and from the network - meaning developers can utlize the full suite and power of Wormhole.
In addition to fully integrated networks, Wormhole also offers a subset of “verify only” networks. Applications on lite integrated networks can listen to and verify messages from fully integrated networks for things like governance votes and oracle data.
The 19 guardians in Wormhole's Guardian network each hold equal weight in governance consensus.