Publish one small layer with a clear coordinate reference system and simple styling before adding a large catalog. Test service requests from the intended client and verify access permissions. Plan caching, resource limits, and updates, because an unrestricted spatial query or expensive style can consume significant server resources.
This is best suited to organizations serving geospatial data to applications. Before committing a larger project, account for these trade-offs: needs secure server administration; large maps and queries need performance tuning.
