Koryo-saram is a big fancy word that means "Korean people living in other countries." You know how sometimes people move to a different place because they want to? Well, Koryo-saram are kind of like that, but a long time ago.
A long time ago, in a place called Korea, some people wanted to live in other countries. Maybe they wanted to start a new life or find a new place to live. They went to places like Russia or Kazakhstan, and they took their Korean culture with them.
Even though the Koryo-saram aren't living in Korea anymore, they still keep their Korean traditions and culture alive. They speak Korean, make Korean food, and celebrate Korean holidays. They also teach their children about their Korean heritage so that it doesn't get forgotten.
Sometimes it's hard for Koryo-saram to fit in with the people in the new country they live in, but they still stay proud of their Korean roots. They might even form communities with other Koryo-saram so they can stay connected to their culture.
So that's what Koryo-saram means: Koreans who live in other countries but still keep their Korean culture and traditions alive.