Of course one of the principle advantage of having a campus job is money. You will be able to earn extra money, which--depending on your lifestyle and financial situation--you can use for covering your daily expenses or for saving up for later excursions and other goals and ambitions.
No matter what kind of job you may have, it will still give you valuable skills and you will gain job experience. You can demonstrate your versatility by being able to juggle both work and study at the same time, and future employers will see that you do not shun hard work and new experiences.
One of the best features of a university job is that you don't need to commute to work, and you will have your classes close by as well. You will be saving not only time, but also any other fares you would normally need to spend on commuting to work.
With a job on campus, you will be able to meet other people in the academic community and build on your network of professional contacts. You will have a chance to socialize with your colleagues. At the same time, you will show your employer that you are a reliable and resourceful employee, who can later serve as an important professional contact of reference in the future.