RPC Nodes
RPC Nodes (sometimes called 'Lite Nodes' or 'Full Nodes') differ from Validators in that they hold a copy of the Nyx blockchain but do not participate in consensus / block-production.
You may want to set up an RPC Node for querying the blockchain, or to provide an endpoint that your app can use to send transactions.
To set up an RPC Node, follow the instructions to set up a Validator, but exclude the nyxd tx staking create-validator command.
If you want to fast-sync your node, check out the Polkachu snapshot and their other resources (opens in a new tab).