承知いたしました (Shōchi itashimashita) means "I understand" or "Understood." It is a humble and formal way to acknowledge and confirm that you have understood a request, instruction, or information. Often used in business settings, similar to かしこまりました but slightly less deferential.

相手の言うことや依頼を理解し、受け入れたことを伝える、丁寧な言葉です。ビジネスでよく使われます。