This document defines plagiarism and discusses why it is important to avoid. Plagiarism involves presenting another person's ideas or work as one's own without proper citation or credit. It is considered theft and cheating. Committing plagiarism can result in penalties like failing grades on assignments. The document clarifies common misconceptions about plagiarism, such as the need to cite sources even when paraphrasing or translating. It provides examples of how to properly paraphrase and quote sources with citations. Copyright infringement is also distinguished from plagiarism. Proper referencing styles like APA or MLA are recommended for giving credit to sources.