On the internet, grammar and spelling errors are common for many reasons. Better spelling, grammar, and punctuation help you communicate with more people because more people can understand you. Therefore, it's good netiquette to use a spell check program because it makes your message easier to read.
It is good netiquette to look past any grammar errors when communicating on the internet because there are so many different reasons for them. Make a mental note of errors and keep reading. Grammar errors do mean something about the author and spell check programs are not perfect.
Spell check programs are only as good as the dictionary it uses to check words. Often times, spell check dictionaries do not have every word. Many words are not included.
Furthermore, Spell check programs do not tell you if you used a word in the wrong context. They tell you if a word is spelled correctly. For example, these programs have been known to correct a spelling mistake with a word that does not fit in the sentence.
Proofreading includes checking a message for spelling and other grammar errors. Spell checking is the first step in proofreading a message and can be done with a software program, which is why it is a separate step in the process.
Reading a message for clarity and quality before sending it is required for proper netiquette because it is easy to send the wrong message for various reasons. On the internet, leaving a word or comma out of a sentence may send the wrong message because people often speak in text and read messages when they have time to analyze them.
It's easy to skip a word entirely or use the wrong letters without even knowing it when texting from a touch screen.
Furthermore, it is easy to jump to conclusions with short messages. Short messages do not give a reader a lot of information. Lack of information can make a person jump to conclusions logically and illogically. This is why emotional texting is discouraged, because humans do not always think logically when emotions are involved.
The meaning of a word or the way it is spelled can change an entire message. Giving a message a 'second look,' no matter what type it is, is always a good idea because it can prevent a misunderstanding.
Proofreading a message is a process that is required for every message sent to be considered proper netiquette.