This is the 10th most frequent Hebrew word.
מה
"What"
The word 'מה' is used as an interrogative pronoun meaning 'what', asking for information about the time.
מה השעה?
What time is it?
The word 'מה' is used as a relative pronoun meaning 'what', referring to the occurrence that was observed.
ראיתי מה קרה אתמול.
I saw what happened yesterday.
The word 'מה' is used as part of a question to inquire about someone's opinion on a specific subject.