The purpose of an informative essay , sometimes called an expository essay, is to educate on a certain topic. It is not for giving an opinion or convincing someone to do something or change his beliefs. In addition to being informative, it needs to be interesting.
Informative essays, sometimes called expository essays, can be used for many purposes. They can compare viewpoints on a controversial subject as long as they don’t include the author’s opinions. They may analyze data, like in a cause and effect situation, or educate the audience on ways to do something, like solving a certain kind of problem.