Yesterday Twitter launched interest-based targeting for their advertising products, allowing brands and marketers to target users based on the content of the tweets they send and the accounts they follow.

Along with this announcement came a somewhat overlooked fact: Twitter is lowering their minimum ad bid from 50 cents to just one penny. And some analysts believe this move could bump up their yearly ad earnings significantly.
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Counting your Twitter followers is a mostly fruitless exercise. If you have 50 followers that you’re engaging and interacting with, that’s much better than 2,000 followers who don’t pay any attention to what you have to say.

The number of followers you have is just one of many metrics you should be using to measure how effective your Twitter efforts are. We’ve got five Twitter metrics beyond follower count for you to use to better understand your Twitter presence.
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Does UberMedia have Twitter in its sights with the launch of its new Chime.in network? The company already owns some of the most popular Twitter apps, such as Twidroyd and UberSocial, and some speculate that its latest project, a social network of its own, is aiming right at Twitter’s achilles heel: its users.
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