Okay kiddo, have you ever heard a song called "Umbrella"? It's a cool song that a popular singer named Rihanna sings. The song is all about how someone is like an umbrella for the singer.
Now, imagine when it rains outside, you take an umbrella with you so you don't get wet. The song is kind of like that, but instead of rain, the singer is talking about how this person is like an umbrella to protect her from bad things in life.
When someone says "You can stand under my umbrella", it means that person will always be there to help and protect you no matter what. That's a really nice thing to have in life, right? It's like having a best friend or a family member that you know you can always count on.
So, the "Umbrella" song is about that kind of protection and support. It's a fun song to dance to and a nice reminder to appreciate the people in your life who are always there for you.