I'll think about what you've said.

Meaning

I will reflect on your feedback.

Examples

• John: I think we should reconsider our approach.
• Alice: <b>I'll think about what you've said.</b> I'll need some time to process this.
• John: Take your time. I want to make the best decision possible.
• Alice: Thank you. <b>I'll think about what you've said</b> and get back to you tomorrow.