Participating in a research internship, such as an REU, can enhance a candidate's profile for graduate school applications, particularly by providing valuable research experience. However, acceptance into a specific university's graduate program is not guaranteed by completing an REU at that institution. While having research experience is generally beneficial and can improve chances of admission to graduate programs, the admissions process is distinct and involves different criteria and decision-makers. Personal experiences indicate that while some applicants from prestigious REUs may not gain admission to their host institutions, others without such affiliations can still secure spots in respectable graduate programs. Overall, REUs can bolster an applicant's qualifications, but they do not directly correlate with acceptance into the university where the internship took place.