Supply-side economics is a way of thinking about how to make an economy better. Imagine if you wanted to have more candy, but you didn't have any money to buy it. One way you could get more candy would be to just make more money. Then you could buy all the candy you wanted! That's kind of what supply-side economics is like.
Instead of giving people more money to buy stuff, supply-side economics focuses on helping people who make and sell things. The idea is that if these people can make and sell things more easily and cheaply, then they will make more things and sell them for less money. This means that more people will want to buy things, which will make the economy better.
One way to do this is to make it easier for companies to do business. This means less rules and regulations that can be difficult and expensive to follow. It also means lowering taxes so that companies have more money to invest in their business and hire more workers.
Another way to help the people who make and sell things is to invest in things like roads, bridges, and other infrastructure. This makes it easier for goods to be transported around the country, making it easier for businesses to sell their products to more people.
So, in short, supply-side economics is about helping people who create things and sell them by making it easier and cheaper for them to do so. And when these people can make and sell more things, the economy gets better!