How do you think Plagiarism and Copyrights are similar and how are they different? Why is Plagiarism wrong (illegal)?

Ok so i am going to keep it honest with you like i always do .Now i don't really know what a Plagiarism is and because of  that reason i cant really answer that question for you. But when i find out i will be sure to let you know how Plagiarism and Copyrights are different.