Netiquette (noun)

1. The conventions of polite behavior in electronic communication, such as email, forums, and social media.
2. Rules of conduct that govern communication over the internet or other digital networks.

Origin:

A blend of "network" and "etiquette".

Examples:

1. Netiquette dictates that you should not send capitalized text as it is considered shouting.
2. The company has a strict policy on netiquette and employees are expected to abide by it.
3. Netiquette is important to consider when communicating with others online.
4. It is considered bad netiquette to send an email without a subject line.
5. Netiquette is especially important when communicating with strangers online.