Arigatou gozaimasu is a polite way to say "Thank you" or "Thank you very much" in Japanese. You use it to express gratitude to someone who has done something for you or given you something. For instance, if someone helps you, you'd politely say, "手伝ってくれて、ありがとうございます！" (Thank you for helping me!).

感謝(かんしゃ)の気持ち(きもち)を伝える(つたえる)、丁寧(ていねい)な言葉(ことば)です。何か(なにか)をしてもらった時(とき)やプレゼントをもらった時(とき)に使い(つかい)ます。