The National Union of Students (NUS) is like a big club for all the students who go to university and college in the United Kingdom. Just like how you have clubs for different kinds of interests like dance or chess, the NUS is a club for students who want to work together to make their lives at university better.
The NUS is made up of lots of different student unions from different universities and colleges all over the UK. Just like how your school might have a student council made up of students from different classes, the NUS has a council made up of students from different universities and colleges. They get together to discuss things that are important to students, like how much they have to pay for their education or what kind of support they need when they're studying.
The NUS also organizes big events, campaigns and protests to highlight different issues faced by students. They fight for things like better access to education, affordable tuition fees, and improved student welfare. They also have a team of elected officers who work hard to represent the interests of students across the UK and make sure that their voices are heard when decisions are being made that will affect them.
Overall, the National Union of Students is like a big group of friends who come together to support each other and work towards a better future for all students in the United Kingdom.