Suppose you have 5 toys and each of them can be exchanged for 1 sugar candy. You love sugar candy a lot and you want to buy more of them from the store. You go to the store and find out that now they are giving you 2 sugar candies for each toy you have. Yayyy! You are happy because you can now buy more candy with just one toy. This means the value of your toy has increased in the candy market. This is what we call currency appreciation.
Now suppose that you buy candies with your toys and eat them. But after a week, you find out that the store is giving you only half the amount of candy for each toy you have. This means you need two toys to buy 1 candy. Ugh! Now you can't buy as many candies as before with the same number of toys. This means the value of your toy has decreased in the candy market. This is what we call currency depreciation.
Similarly, different countries have their own currencies, just like you have toys and candies. If the value of a country's currency increases in the global market, it means that the country's currency can buy more goods and services from other countries. This is good news for that country's economy because they can now buy more things with the same amount of money. This is currency appreciation.
On the other hand, if the value of a country's currency decreases in the global market, it means that the country's currency can buy fewer goods and services from other countries. This is not good news for that country's economy because they would have to spend more money to purchase the same items they could have bought before for less money. This is currency depreciation.
So, just like the value of your toys can change in the candy market, the value of a country's currency can change in the global market. These changes can have a significant impact on the country's economy, its imports, exports, and trade relations with other countries.