Madih Nabawi is a type of praise or poem that talks about the Prophet Muhammad. Imagine if someone wrote a special song just about your favorite superhero or role model, that's kind of what Madih Nabawi is like!
Basically, people who love the Prophet Muhammad and want to show their appreciation and admiration for him, write or sing Madih Nabawi. It usually talks about how kind or brave or wise he was, and how grateful people are to have him as an example to follow.
People have been writing and performing Madih Nabawi for a very long time, because the Prophet Muhammad is very important to many people all over the world. It's a way to show love and respect for him, and to remind people to try and be like him in their everyday lives.