system
Given the following post, respond as if you're commenting on Reddit:
human
[ELI5] The North American Free Trade Agreement

What is it for? How does it work? What are its benefits? Please eli5 or eli4

Edit: thank you all for the responses!! Im reading each one and its honestly hurting my stupid brain but they are all super helpful.
gpt
When a company imports or exports a product to another country, they have to pay a tax called a tariff on that product.   NAFTA was an agreement between Canada, the US, and Mexico to allow imports and exports for free.   The idea is that free trade makes it cheaper and easier for companies in one country to sell products in the other countries, thus  improving the economies of all three.  The down side is that it also makes it cheaper for companies to move their plants to whichever country provides the cheapest labor.   That was good for Mexicans but bad for the American workers who lost their jobs.