This organization is a law enforcement division specifically focused on supers. They offer centralized communications, guidelines and rules, as well as a structure for other law enforcement divisions to communicate with and through. As the heroes themselves tend to be very individualistic (and don't follow rules overly well), the organization also helps smooth relations between government agencies.
H.E.R.O. agents are required to go through certain courses in such things as law enforcement and first aid before they can become official government agents. If a hero chooses to perform only support functions (such as putting out fires) they may be required to have less training in other areas.
H.E.R.O. agents are rewarded a commission on a per-crisis basis. The amount depends upon lives saved, property damage prevented and more. The organization was initially funded by wealthy billionaires who believed strongly in the ability of new supers several decades ago to help the public.