Netiquette refers to etiquette guidelines for online communication and interaction. Some key aspects of netiquette include: - Treat others with respect online and do not engage in flaming or personal attacks. - Avoid typing in all capital letters, spamming others by repeatedly sending the same messages, and communicating with strangers met online. - Follow proper etiquette by being honest, obeying copyright laws, using proper grammar and spelling, and adhering to sites' terms of service.