defamation libel and slander

I really enjoyed reading this article and then fill out answers provided by my teacher regarding the same topic. I learned from this article that how people misuse the internet by putting bad comments and reviews to ruin someone business and their name . in this era, reviews of people regarding anything really does a great matter in this social media life because nowadays people don't believe on someone work and the hard work they just believe on comments and reviews what others said about someone.