Simple question about BC

Okay, this may seem like a silly question.

I often go into my user profile to click TRACK to see if any new comments have been made on my stories, stories I have commented on, or blogs I have commented on too.

Today, like on other occasions, I see in red 'Updated' and no new activity in that story or blog in the way of comments.

When there is no activity as in new comments or edits I have made to a story I have written and I see a red 'Updated,' what was updated?

For example, I saw it on my Wonder, Woman? story.

AuP