Group Display Names in inspections

What is the purpose of group display names in inspections as returned by this method:

  public String getGroupDisplayName() {
    if (myNameProvider != null) {
      final String name = myNameProvider.getDefaultGroupDisplayName();
      if (name != null) {
        return name;
      }
    }
    LOG.error(getClass() + ": group display name should be overridden or configured via XML " + getClass());
    return "";
  }


I.e. what shoudl I set the group display names of our inspections to? Where are these names used?