Anything that can give reviewers a sense of you as a person belongs here;
you can repeat information about your experiences in your research statement, but any experiences that show your promise, initiative, and ability to persevere despite obstacles belongs here.
This is also a good place to display your communication skills and discuss your ability to maximize effective collaboration with a diverse cross-section of the academic community.
If you have faced any obstacles or barriers in your education, sharing those experiences serves both for the selection process, and for your nomination for fellowships.
If one part of your academic record is not ideal, due to challenges you faced in that particular area, this is where you can explain that, and direct reviewers’ attention to the evidence of your promise for higher education.
但同时,他们也给出了SOP的指导:
要求具体到这样的: Part 1: Introduce yourself, your interests and motivations Part 2: Summarize your undergraduate and previous graduate career Part 3: Discuss the relevance of your recent and current activities Part 4: Elaborate on your academic interests
两相对比,你很容易就能看出这两者的区别。