Interrogative pronouns in Maori grammar are essential components in forming questions. These are words such as ‘hea’ (where), ‘aha’ (what), ‘wai’ (who), ‘pehea’ (how), ‘hia’ (how many), and ‘hea’ (which). They play a crucial role in communicating inquiries and obtaining information, just like the English words ‘where’, ‘what’, ‘who’, ‘how’, ‘how many’, and ‘which’. Understanding and accurately using these pronouns are pivotal in mastering the Maori language.