Symplectomorphism is a big and fancy word that has to do with a certain kind of math that is used to study shapes and spaces. It's a bit like how you might play with different kinds of blocks or Legos to make different patterns or designs.
But instead of playing with physical blocks, mathematicians use something called a symplectic manifold to study these shapes and spaces. A symplectic manifold is like a special kind of puzzle or shape that is really tricky to figure out, but once you do, you can study all sorts of cool things about it!
A symplectomorphism is like a special kind of change you can make to a symplectic manifold. It's like if you take a puzzle or shape and move some of the pieces around or twist it in different ways. This might seem like a simple thing to do, but it can actually tell you a lot about the shape or space you're studying.
The reason why symplectomorphisms are so important is because they have a lot of interesting properties. For example, they can help you understand how the shape or space is connected, or how it behaves when you change certain parameters or variables.
Overall, symplectomorphism is just one of many cool and interesting areas of math that can help us learn more about the world around us, even if it seems a bit complicated at first!