MBO, or Management by Objectives, is a process where management and employees agree on objectives for the organization and individual roles. The goals should be SMART - specific, measurable, achievable, result-oriented, and time-related. Performance is periodically reviewed to determine progress toward objectives, and rewards are given based on goal attainment. MBO aims to improve motivation, communication, performance, and efficiency but can demotivate staff if targets are unrealistic or imposed without agreement.