Okay, kiddo, you know how in the Olympics, different countries send their best athletes to compete in different sports and win medals? But sometimes, countries don't get along with each other very well and they don't want to be on the same team as each other.
So, what some people do is they have a special team where athletes from two or more countries can come together and compete as one big team. This is called a unified team at the Olympics.
The idea behind this is to show that even though countries may have differences and disagreements, they can still work together and be friends through sports. It's like when you play games with your friends from different schools or neighborhoods, you still have fun together even if you are different.
So, at the Olympics, when you see athletes competing together from different countries, you can remember that they're all part of one team, and that's pretty cool.