This is the 1963rd most frequent Japanese word.
じゃあ
"じゃあ" means "well then," "in that case," or "so."
Here, 'じゃあ' is used as a transition expression meaning 'then', commonly used in conversations to suggest a response or next action.
じゃあ、一緒に行きましょうか!
Then, shall we go together?
In this sentence, 'じゃあ' serves to react to a preceding statement, leading into a question about the identified issue.
じゃあ、何が問題なの?
So, what is the problem?
Here, 'じゃあ' is used in a conversational goodbye expression, aligned with 'ね' to create a friendly tone.