Twitter has established itself as the social PR tool on the web. Any brand on the web that wants to signal effort and understanding of the game must have a Twitter account with daily updates.<p>The value for marketers is clear. It's an inexpensive way to build organic traction.<p>The value for individual users, who are the product, is less clear. Twitter is immensely noisy, and is becoming more noisy as it's use as a PR tool increases. It's not clear to me why, overall, it's worth it for people to read their Twitter feeds. I certainly don't read mine, I just push out a tweet a day to signal I'm trendy.<p>For example, Fred Wilson's Twitter updates are links to his blog posts plus some (for me) out of context public messages to people I don't know, ie. junk (for me). I might as well unsubscribe and add his RSS to Google Reader and save myself the noise. Just did.