Delegation involves assigning tasks and responsibilities to subordinates while maintaining overall accountability. It allows managers to overcome limitations and accomplish more. There are three types of delegation - downward, upward, and sidewise. Successful delegation requires clear communication of expectations, authority, and responsibilities. While it can improve efficiency and development, some managers resist delegating due to control issues, lack of trust, or preference to do tasks themselves. Centralization and decentralization refer to how authority is distributed within an organization.