In general terms, ESS joins environmental science with social, economic and ethical questions. You are asked to understand how natural systems work and also how people, communities and decisions shape, and are shaped by, those systems. That breadth is part of what makes the course interesting, but it can also feel like a lot of loosely connected material when you meet it for the first time.
A tutor can help you organise the ideas in the course so they feel connected rather than scattered. That might mean building your own summary maps, linking a scientific idea to the human decisions around it, or practising how to explain the same issue from more than one point of view. Your tutor works alongside your school course and your teacher, and helps you make sense of the material you already have.