The purpose of the Common Good system is to create and fund community-centered participatory democracy. In a Common Good Community* you decide together how many Common Good Credits to issue (within safe limits) and what to fund with them.
A Common Good Community is in "good standing" when it is issuing Common Good Credits responsibly, so they accurately represent the potential of its members to produce corresponding goods and services in the short term. A Common Good Community may lose its good standing if it runs a trade deficit with other Common Good Communities and fails to redeem it in a timely manner. Common Good staff and other Common Good Communities will provide ongoing feedback, to prevent this from happening accidentally.
* There are no specific requirements for a group of members to become a sovereign Common Good Community. But these Clearness Questions will help you get ready for that responsibility.