Others use it to access online groups, or Facebook and Twitter.
But these people are in danger of being hit with bugs and viruses, by those who want to cause distress, by hacking into computers.
Many people like myself have fallen victim to things like this over the years, because we don't always react as fast as we should do.
Please be on your guard and never open an e- mail from someone you don't know.
Always use a reliable anti virus software on your computer, and if your not sure about something, ask a friend who uses the internet.
Always use passwords and write them down, then keep them safe.