앞쪽(ap-jjok, apjjok)
Refers to the front part or area of an object or reference point, emphasizing position
When to use
Everyday position indication, Relative position description, Informal conversation
The nuance
Used when specifying a concrete, relative position, indicating relation to surroundings or an object
앞(ap)
Basic meaning of 'front', used simply to indicate direction or position
When to use
Casual conversation, Direction indication, Simple position description
The nuance
Most general and broad term, used simply to point or describe front position or direction
전방(jeon-bang, jeonbang)
Formal term for 'front' used in military, traffic, official documents
When to use
Military term, Traffic guidance, Official documents
The nuance
Used in formal and technical contexts, suitable for official terms like front surveillance or front driving