Okay kiddo, so you know how sometimes there are really important people in a country that helped make it a better place? Well, sometimes people build statues of those people to remember them and to show how much they are appreciated.
Statues of the liberators are statues of people who were very important in helping their country become free. These people are called "liberators" because they helped to "liberate" their country.
For example, in the United States, we have a big statue of a man named Abraham Lincoln, who was an important leader that helped to end slavery in our country. In South America, there are statues of people like Simon Bolivar and Jose de San Martin who helped their countries become independent from Spanish rule.
So when you see one of these statues, remember that they are there to remind us of the brave and important people who helped make the world a better place. Cool, huh?