Kathy,
What is it about Second Life that you don't understand? It's like a video game. The only difference is, you're not actually playing "a game!" You choose a character, (aclled an avatar), to be YOU. Other people chose one as well. You can make your avatar walk around what may look like a little town... You see other people's avatars.... and you can type into a chat window to talk to them, or you can speak into a microphone to talk to them. They can do the same.
Just tell me what you don't understand so I can help you further. :)
Jonathan
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