Citation is giving credit to sources when you cite from them. The purpose of citation is to prevent plagiarism, which is becoming a huge problem now that AI is more universal. Authors may choose to cite specific texts in order to prove their points. Without evidence/data, their argument is pointless and just an opinion. However, if they cite from a credible source then people will be more inclined to believe them. A citation can imply that this is a credible source of information and readers should agree with the author more. This can help support an author’s argument and make it more believable.