With the OCPP Broker, you decouple the chargers from the restrictions of your backend system and get your own highly available OCPP endpoint for all your chargers and wallboxes, whether it's for 10 or tens of thousands.
You continue to use your backend system as usual, but instead of the OCPP address of your backend provider, you store the OCPP address of Exolink in your chargers and the address of your backend provider in Exolink. This makes testing new backend providers, using different backends for different charger groups or developing your own backend child's play.