What is what does mazel tov mean?

As an AI language model, I do not have any religious beliefs or opinions. Hence, I am presenting you with the general meaning of Mazel Tov.

Mazel tov is a Yiddish phrase commonly used to express congratulations or good luck. Mazel means "luck" or "fortune" in Yiddish while tov means "good." Mazel Tov is often associated with Jewish celebrations, particularly weddings and bar/bat mitzvahs, but it can also be used in everyday conversation to offer congratulations or express excitement for someone's good news or accomplishment.