Copyright is a law that gives people the right to declare ownership on the things you create. Copyright is important because it gives people the right to reproduce their work, distribute copies, perform their work and display the work publicly. Copyright is also important so other’s will not take work that does not belong to them and make it their own, something similar to plagiarism. Plagiarism is something many people who display their work on the web should think about.
Fair use is copying copyrighted material to comment on criticism and parody. Fair use can be done without getting permission from the copyrighted owner. If you use someone’s material and it qualifies as fair use, it would not be considered infringement.