Question

a special set of manners followed while using the Internet.

Answer 1

Netiquette, a colloquial portmanteau of network etiquette or Internet etiquette, is a set of social conventions that facilitate interaction over networks, ranging from Usenet and mailing lists to blogs and forums.

Answer 2

Netiquette or Internet etiquette is the special set of manners followed while using the internet.

It is regarding the guidelines for posting the messages to any of the online services mainly the internet newsgroups.

It not only is for the maintaining civility in the discussions but also the special guidelines that are unique to the use of electronic message forum.