Okay, imagine you're in a class with a bunch of other kids, and all of you are really good at learning and studying. That's kind of like what the U15 group of Canadian research universities is. It's a group of 15 really smart universities in Canada that are all really good at studying and learning about different things.
These universities are big schools where lots of people go to learn about all sorts of different things, like science, math, history, and art. But they don't just teach classes to students - they also do a lot of research. Research is like exploring and discovering new things, but with a lot of really smart people working together to figure stuff out.
The U15 group of universities in Canada is really important because they work together to do even bigger and better research than they could do on their own. They share their ideas and work together to solve really big problems, like finding ways to make new medicines or understanding how our planet works.
So, just like how you and your classmates might work together to finish a big project or learn something new, these universities work together to do really great things for Canada and the world.