system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How does a currency become "stronger" or "weaker" with respect to other currencies?

How do countries ensure that their currency remains stable?
gpt
Mostly the best ways to keep your country's currency stable are to:

1. Make sure there is a market for your country's goods and services abroad. Foreigners will want to buy your currency so they can buy your goods and services. This demand increases the value of your currency.

2. If the demand for your currency starts to get too high, it will become too expensive and foreigners won't be able to buy your country's goods and services any more. If this happens, your government can print more money to buy your people things like roads, hospitals, schools, or bombers. This increase of your money will lower the value of your currency.

If you are good at balancing these two strategies, your country's currency should stay fairly stable.

I hope this helps. Please rule your people justly and kindly.