A croffle is made by cooking croissant dough in a waffle iron, so it becomes crispy on the outside and soft inside. (It's the perfect balance, if you ask me.)
Some of the types of food you can find here are connected to the local environment. Fitzbillies is especially connected to Cambridge because it is a well-known local bakery and café. Other places, like Costa Coffee, are found across the U.K., while restaurants like Baan Thai bring food from other cultures into Cambridge.