Okay kiddo, so there are two groups of people in India called Hindus and Muslims. They have different beliefs and worship different gods. Sometimes in the past, they have had disagreements and fights.
Now, some people believe that it is important for Hindus and Muslims to get along and work together as friends. This is called Hindu-Muslim unity. They say that we should respect each other's beliefs and live peacefully together.
It is important to remember that everyone is different and that's okay. Hindu-Muslim unity means that we can be friends with people who are different from us, even if we don't agree on everything.