Is it correct to write It has been a good learning experience?

Yes, "It has been a good learning experience" is grammatically correct. It is a common and natural way to express that you have learned something valuable from a particular situation or event.

However, the sentence is a bit vague. To make it more impactful, you can:

* Add more details: "It has been a good learning experience, especially in terms of [specific skill or knowledge gained]."

* Make it more specific: "The challenges I faced during this project have been a good learning experience."

* Show the impact: "This experience has been a good learning experience and has helped me to [specific improvement or benefit]."

By providing more context, you can make your statement more engaging and meaningful.