A team blog is another communication method to tell about your team. Others subscribe to or follow your blog to see the updates. Many blog sites are free. WordPress, twitter, blog.com, and blogger.com are some example of hosting locations.
Updates, by creating posts or entries, usually cover an update for a day or special event. A blog is often a way to tell a story over several days.
Many FIRST teams have team blogs to document and share their build season progress for others to follow along.