Copyright is a law that protects works created by authors, artists, and others. It covers all original works from the moment of creation, including poetry, books, movies, songs, plays, and more. The law protects works posted online and sets rules for using portions of copyrighted works, such as only using 10% or up to 3 minutes of media. It also requires giving credit to the original creator and understanding copyright affects how much of others' works can be used.