You’ll be able to do more than retweet; soon you’ll be able to share Tweets offsite.
…sometimes you want to share with another group, like your college roommates or your parents or a friend who isn’t yet on Twitter,” says Twitter employee Stefan Flip in the update…
According to their site, the email function will allow users to simply click on the “More” icon and select the email function to email their tweets. In addition adding comments to tweets can be done via email as well.
The current way users can share tweets via email would be by copying and pasting the message from the site and then sending a standard email. However, with this new email function it makes it slightly easier for users to share a tweet – possibly helping to expand Twitter’s userbase.