What you’re looking for here are Author pages, see this Codex article.
Here are a couple of other articles that explain the process:
http://wp.tutsplus.com/tutorials/how-to-create-a-wordpress-authors-page-template/
http://wpengineer.com/1958/wordpress-3-0-specific-author-templates/
Often you’ll want to display all the posts by that author after the author description. To get that link use <?php the_author_posts_link(); ?> :
http://codex.wordpress.org/Function_Reference/the_author_posts_link
Best of luck!