Okay kiddo, you know how sometimes when you want to do something really cool or important, like going to a fun park or starting a lemonade stand, you might not have enough money to do it all by yourself?
Well, sometimes big companies or rich people can help you out by giving you some of the money you need. They are called financial sponsors.
In the grown-up world, financial sponsors are people or companies who give money to other companies so that they can do big, important things like building new buildings, making movies or starting new businesses.
Think of financial sponsors like your friendly neighbor who gives you some extra cash to help you set up your lemonade stand, but on a much bigger scale.