You could find a review for this in an entertainment magazine, or it could be found on a music website like billboard.com
A short statement or paragraph that tells what something is about
The purpose of Martin Luther King's "I Have a Dream" Speech is to expose the American public to the injustice of racial inequality and to persuade them to stop discriminating on the basis of race. He discusses the state of racism throughout the nation and his hopes for freedom and equality in America.