An adverb meaning 'at once', 'immediately' or 'right now'; emphasizes that something should/does happen without delay.
その書類を今すぐ提出してください。
Please submit that document right away.
危険だから今すぐここを離れて！
It's dangerous, so leave here immediately!
彼に電話をして、状況を今すぐ確認する。
I'll call him and check the situation right now.