understanding of the importance of audience and purpose in communication

My group choose to write an email to our friend who is researching about unicorns. We choose to do this because we thought it would be most effective because she would need information fast and this would be a quick way since she is probably researching on a computer. Our choice was not to stressful because we all knew it would not be to hard to write an email to our friends about unicorns. We sent them some facts about unicorns we though would be helpful for them.