It’s there to advise and support children and young people, or those who care for them if they feel that a child has been treated unfairly.
Mae'r gwasanaeth hwn yn rhoi cyngor a chymorth i blant a phobl ifanc, a'r rhai sy'n gofalu amdanynt, os ydynt yn teimlo eu bod wedi cael eu trin yn annheg.