Plagiarism involves passing off another's work as your own by copying their ideas, words, or concepts without giving them proper credit. It is wrong because it misleads others into believing the ideas were original to you when in fact they came from someone else. To avoid plagiarism, one should cite sources using internal citations within the paper and a works cited page, give credit to original authors, and only use common knowledge or uniquely phrased ideas without attribution. Proper citation and attribution demonstrates respect for other authors and allows readers to verify sources.