Weight of Summer Program Supplemental Reccomendation in Undergraduate Admissions

Hi everyone! I was wondering how much weight a Summer Program Supplemental Essay in Undergraduate Admissions? This past summer I attended the Columbia University Summer Program. My professor wrote many nice things about me and ended the recommendation by saying “Based on his performance in this college-level course, I anticipate that he will meet the standards of excellence of a college with demanding curricula.” What can this do for my application? Can it make up for an SAT score on the lower end? Thank you all for your time!