[noun] [U] [specialized] - the set of rules which control ways of behaving that are used when writing e-mail or while talking to people in a chat roomIt is considered bad netiquette to write using capital letters because it looks like YOU ARE SHOUTING.See study section: E-mail
NETIQUETTE
Meaning of NETIQUETTE in English
Cambridge English vocab. Кембриджский английский словарь. 2012