Graduate school admissions are competitive, but research experience is a key factor for acceptance. While Research Experiences for Undergraduates (REUs) are prestigious and beneficial, they are not strictly necessary for admission. Graduate school committees value any documented research experience, including summer research conducted at one's own university. Strong recommendations and potential publications from this research can significantly enhance an application. Ultimately, the quality and impact of the research experience matter more than the specific setting in which it was conducted.