net·i·quette 
/ˈnɛtɪkət/ noun
/ˈnɛtɪkət/ noun [noncount] informal : rules about the proper and polite way to communicate with other people when you are using the Internet
▪ Writing an e-mail message in all capital letters is considered a breach/violation of netiquette because it looks like you are shouting. ▪ the rules of netiquette
▪ Writing an e-mail message in all capital letters is considered a breach/violation of netiquette because it looks like you are shouting. ▪ the rules of netiquette
