Why is Simon Bolivar Known as "The Liberator"? Describe what he did and how he helped his people.

Simon Bolivar is the name most closely connected with the liberation of South America.  As you say, he is known as the liberator of the continent.

Although he is known as the liberator of South America, his importance is actually limited (if you want to say it that way) to the northern part of the continent.  He was the leader of the rebellions that liberated the areas that are now Colombia, Ecuador, Venezuela, Bolivia, and Peru.

As far as how he helped his people, that's up for debate.  He did lead the wars for independence.  But he later became disillusioned with how the new countries were behaving after becoming independent.  So it's not clear he would have said he helped the people at all.

So -- he led the liberation of the countries, but beyond that it's not like he ruled any of them for very long or led them to stability or prosperity after they became independent.