What exactly do the services for low-income students and services for minority students do?
Are you asking about services for low-income students at colleges themselves? And if so, at which colleges? Those services will probably vary from college to college. Or are you asking about services that help low-income and minority students into college and work with them after they get there, like Questbridge?
I want to know what the service itself does for a student at a school like UPenn
http://www.vpul.upenn.edu/Low-IncomeFirst-GenerationStudents – this link shows that various programs and services offered to low-income and first-generation students at UPenn.