What is the difference between a normal shutdown and an abnormal shutdown?

Definition :
A normal shutdown refers to when the user shuts down the system through the standard procedure, such as clicking the "Shut Down" button or following the proper power-off process.
An unexpected shutdown occurs when the system loses power abruptly without following the proper procedure, such as during a power outage, unplugging, or a system crash.

Characteristics :
A normal shutdown: A safe shutdown process ensures data security and hardware stability.

An unexpected shutdown: It carries risks of data loss, file system corruption, and hardware damage, and should be avoided whenever possible.