Prescriptivism and Descriptivism

Prescriptivists are against language change and believe that standard English is the only way we should speak, it aims to teach what is percieved as 'correct language' and that punctuation is important in society for communication. Whereas a descriptivist would be more accepting of language and understanding of language change, and has the opposite views to prescriptivists.
Ultimately descripitvists see how language is used and prescriptivists have views on how language should be used.

Lynn Truss is a prescriptivist and she uses her views to remind people that punctuation is important. She has said that people are putting important things like apostrophes in the wrong places or dropping them all together so the English language is beginning to make little sense and soon grammar will be completely gone. She also believes that without the use of punctuation, there is no reliable way of communicating meaning.
On the other hand Frank Palmer said that what is correct is ultimately what's accepted in society , because language is a matter of conventions within society. His opinion is that language is not set and can be changed, as there is no absolute correctness of language.