Enrolling in GMAT coaching is not strictly essential, as self-study can be sufficient for disciplined and motivated candidates, especially when using official materials and structured resources. However, coaching can provide expert guidance, personalized strategies, regular feedback, and a disciplined study routine, which can be particularly beneficial for students struggling with certain sections or aiming for high scores. When deciding, students should consider factors such as their baseline knowledge, learning style, time availability, access to quality study materials, ability to stay motivated, and target score. Ultimately, the choice between coaching and self-study depends on individual needs, preparation goals, and the level of support required to maximize performance.