Finally Twitter has released it’s official Tweet Button that can be calculate how many times a URL has been shared on twitter website.
Off course this is not a new news. A third party site, TweetMeme already offering tweet buttons over the web and receiving up to 750 million impressions per day for tweet button.
Currently Tweet Button is available in 3 different sizes (10×20, 55×20, 55×63) with five customizable settings. You can easily add it to any website with a few line of code.