Statement of purpose or better known as SOP can be highly crucial because you are conveying your mission and vision of your candidature.
SOP is a direct reflection of top of mind thinking process or frame of mind. You would not be able to hide facts. Idea is to write SOP in a way that must take you forward and get you a space in the mind of your target group.
Chances are high that you may be asked few questions in PI based on your SOP. Clarity on your own thoughts will yield you success.
SOP is a golden opportunity to communicate your USPs which must be unique and must excite audience to engage you for further discussion so to select you in MBA admission.