one's course of action; whether to advance or retreat, stay or leave
A formal yojijukugo used in serious contexts about career decisions, life choices, or strategic moves. Often implies weighing whether to remain in a position or resign/withdraw.
He is seriously considering his course of action, whether to stay or leave.
The president's decision on whether to stay or resign is attracting attention.
進退 means 'advancing or retreating' and is a component of 進退去就, but 進退 alone is more general and less formal.
去就 means 'leaving or staying' and is also a component; 進退去就 combines both for a comprehensive expression of one's life or career decision.
A yojijukugo composed of 進退 (advance or retreat) and 去就 (leave or stay). The exact historical derivation is uncertain, but it is a formal compound used to express one's decision about a course of action.