FAQ answer; what is Netiquete and how to use it

Knowing the Internet culture is important to your company¹s online image
The Internet offers a level playing field. No one knows your gender, age color, religion or other characteristics that lead to prejudice and bias.
Find out where it is appropriate to place your messages/ ads/ marketing efforts. There's a place for everything. Put something where it's not wanted, and you'll likely get "flamed".
Geographic location isn't much of an issue on the Internet. You can be searching a library's database in London one minute, and five minutes later log on to a computer in Hong Kong.
Give back to the community by providing free services and information and by fostering exchange of ideas.

Advertising = Designed to get attention; contains hype.
Marketing = Provides useful information about products and services with the intention of creating interest/ provoking a communication exchange that ultimately gets customer to buy.

Online etiquette is often referred to as "netiquette".
Remember: You are communicating with real people, not machines.

Some service providers have rules against sending commercial-type messages. Find out your service provider¹s policies.
Use the same courtesy as you would extend someone you are having a phone conversation with.
Don¹t entice a flame and don¹t participate in flamefests. Flaming occurs when you send a message that provokes an angry, and often nasty, response. When others join in, a full-fledged flamefest ensues.
Use the same rules regarding good grammar, punctuation and word choice as you would for any written communication.
Don¹t type your message in all capital letters they¹re hard to read. This is known as SHOUTING and may provoke flaming.
Some Email systems occasionally become plagued with electronic versions of chain letters. Don't participate in them.
Use the subject line to give recipients an idea of the message¹s contents.
Use the correct address.
Keep quotations/ excerpts to a minimum when responding to Email you have received.
Check the validity of any message you receive that asks you to do something questionable.
Don't use vulgar language or make sexist comments.