Tweets when you post, obviously. It looks at the post format to figure out what the message should look like. Also adds the appropriate meta tags to activate
Twitter Cards.
- Upload
tweet-posts to the /wp-content/plugins/ directory
- Activate the plugin through the 'Plugins' menu in WordPress
- Apply for a Twitter API key at http://dev.twitter.com/apps
- Update the Twitter API information in the Options -> Tweet Posts menu
If you'd like to use Twitter Cards, apply for that on the
Twitter Dev site as well.