It may sound like a chore, and it will certainly take a substantial amount of work. But it's also a unique opportunity that can make a difference at decision time. Admissions committees put the most weight on your high school grades and your test scores . However, selective colleges receive applications from many worthy students with similar scores and grades—too many to admit. So they use your essay, along with your letters of recommendation and extracurricular activities , to find out what sets you apart from the other talented candidates.