The document discusses several types of copyright infringement including composition infringement, song plagiarism, and artwork infringement. Composition infringement involves using significant parts of a copyrighted story without permission. Song plagiarism is common due to the limited number of musical notes but can involve directly copying melodies, vocals, or the overall sound of a song. Artwork infringement is easy on the internet where people can easily copy others' ideas and pass them off as their own. All of these infringements negatively impact original creators and are violations of copyright protection.