Here's a simplified way to think about it:
* The Milky Way is like a single city.
* The universe is like the entire Earth, with countless cities (galaxies) spread across it.
Here are some more details:
* The Milky Way is a spiral galaxy containing billions of stars, including our Sun. It's about 100,000 light-years across.
* The universe is the entirety of space and time, containing billions of galaxies like the Milky Way, as well as all the matter and energy within them. The observable universe (the part we can see) is estimated to be about 93 billion light-years across.
So, while the Milky Way is a vast and impressive structure, it's just a tiny part of the immense, ever-expanding universe.