There is no one right way to structure employee resource groups.
Every organization has to solve for these issues while taking into account its own unique culture, organizational structure, marketplace variables and the community in which it works. What might end up working for one organization, may not work in another organization.
Today, ERGs/BRGs can play a role in the workplace including recruitment, retention, talent identification and advancement, and in the marketplace, including connecting with new consumer groups, developing culturally relevant products, driving supplier diversity, and solving business problems.