Ok kiddo! Have you ever heard of Psychiatry? It's a science that helps people who have mental health problems like depression, anxiety, or schizophrenia. Psychiatry tries to understand these problems and how to treat them so that people can feel better.
Now, there are a lot of different people who study Psychiatry, all around the world! They look at the genes that make us who we are (you know, like our hair color and eyes!), and they try to see if there are any differences in those genes that might cause some people to have mental health problems.
And when all those people who study psychiatry from all over the world work together, they can learn even more than if they were working alone! That's why they formed the "International Society of Psychiatric Genetics" - to work together and share their discoveries with each other.
So, the International Society of Psychiatric Genetics is like a big club, where people who study Psychiatry can talk to each other and try to understand how our genes affect our mental health. And by working together, they can help more people feel better!