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?

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