Register online once and then use your saved data in a number of ways: this is the idea of the Servicekonto.NRW.
As a German citizen, you may use the data collected about you on all the connected portals and online provisions.

Connected portals include the online provisions of towns and municipalities and those of ministries and authorities of the state administration of NRW. The Servicekonto.NRW is a joint provision of the Ministry of Economic Affairs, Innovation, Digitisation and Energy of the State of North Rhine-Westphalia and the Dachverband kommunaler IT-Dienstleister (KDN).

The Servicekonto.NRW is a voluntary provision for all German citizens.