This is the 210th most frequent Hebrew word.
ואז
"And then."
Here 'ואז' is used to show the chronological order between two activities.
לקחנו מטרו לעיר העתיקה ואז חיפשנו מסעדה לאכול בה.
We took the metro to the old city, and then we looked for a restaurant to eat at.
In this case, 'ואז' indicates the immediacy of the second action following the first.
היא שאלה שאלה, ואז ענתה על השאלה בעצמה.
She asked a question, and then she answered the question herself.
The word 'ואז' connects two sequential actions, indicating what happened next in a series of events.