This plugin beefs up the posts on your blog by displaying a short Infobox about the author on each post. Especially if multiple users blog on your site this is a great way to give your authors credit. If there's an author who doesn't like the box, no problem either: you can toggle the display from your own profile page.
It's really easy to use, just install & activate it, then fill the personal information in your profile and you're good to go. It's that simple.