Public policy is like the rules that everyone in the United States follows. Just like how you have rules at your school or your house that you have to follow, the government has rules too that everyone has to follow. These rules affect lots of things like how you get healthcare, how roads are built, and how things are paid for.
The government makes these rules by thinking about what is best for the people who live in the United States. They listen to people's ideas and also do research to make sure the rules they make are the best ones they can come up with. Sometimes, different people have different ideas on what the rules should be, so the government has to have conversations and debates to decide what the best rules are.
Once the government has made the rules, they tell everyone what they are through things like speeches, news reports, and written documents called laws. Then, government workers make sure that people are following these rules. If someone doesn't follow the rules, they might get in trouble with the government.
Overall, the public policy of the United States is like the big set of rules that everyone has to follow. The government makes these rules to make sure everyone is treated fairly and that the country is a good place to live for everyone.