Build your pizzeria website in Norwich
Norwich in September is not Norwich in June. The university fills the city and empties it again, which inverts the normal restaurant market: the busiest eight months of your year are followed by three months where demand nearly stops. A site is not an answer, but a channel is.
Build a customer list during term
Apps reach whoever is nearby tonight. A mailing list reaches people through July and August, which is when you need to keep them. Every order through your own page during term is an email contact you can use in summer, telling them the real hours instead of losing them to a listing that says you are closed.
Own the city during term, keep the residents after
Earlham and the City Centre are separate markets: one empties at the beginning of June, the other stays all year. A site that names both reaches both, and a mailing list built during term lets you stay in touch with the residents who stay.