According to Stewart's analysis, current case law makes it unlikely a retweeter would be held liable for a defamatory retweet […]

You know it's an iPhone or iPad app, but those new to you, who came via a retweet or Twitter search, may not know which platform your app supports.

And the web—particularly social media—provides countless opportunities for intertextuality, chances to recontextualize, retweet, repost, riposte.

Because your messages will be relevant to them, they are much more likely to retweet your messages and recommend that other people follow you on Twitter.