This is used by ePO, it is not configured by default. Essentially you can setup ePO to gather stats from MWG (so ePO can show you pretty dashboard information), and also you can have lists which ePO can update (which will be updated on MWG).
This is configured in two places:
1. Accounts tab
2. Configuration > ePolicy Orchestrator
If a user updates a list in ePO, the list in MWG will be updated immediately.