The university that you studied is traditionally known as 'Alma Mater", latin for "nourishing mother". This expression shows how important this period is for the person´s life, and consequently, how it can prepare them for sucess in life, wether academic, social, or cultural.
The academic environment is probably the most relevant. The classes and teachers, telling their views on the content you are studying, also with their perspectives in life, can be very helpful on achieving your goals. In the academic aspect you could also include the access to all the books and articles in the university library and website.
Social life in the university years is also very important as it is there that most people start their networking. There you can meet your future partner, employer or employee. Or your first girlfriend/boyfriend. Or maybe just friends...
The cultural environment is also very relevant in university. Many famous writers started writing for academic magazines and websites, many bands were formed and started playing in university events. The same for painters and sculptors. Artists in general have a great oportunity to blend all three environments and start their career sucessfully in university.
But of course, it all depends on the university you have been through, the city it is based, and most important, how you managed the opportunities you had in this moment, in order to prepare yourself for success.