乙方应对甲方提出的意见及建议做出及时有效的反馈并改进工作.

Question

乙方应对甲方提出的意见及建议做出及时有效的反馈并改进工作.

Answer 1

Non-contractual:
Party B should provide timely and effective response to and to make improvement based on party A's suggestion and/or comments.
Contractual:
Party B shall provide timely and effective response to and to make improvement based on party A's suggestion and/or comments.