My bookshelves are arranged for finding stories long after I've read them based on how I felt about them. Here's a breakdown in case you're interested about how this random user feels about your story:

Favorites - The stories I am certain to come back and reread or recommend. 10% of the total number of stories I've read on this site.
Good - The stories I might come back and reread or recommend. 15% of the total number of stories I've read on this site.
Upvote - A private bookshelf. It means I've upvoted the particular story and didn't place it into the above categories. 28% of the total number of stories I've read on this site.

The current total of stories I've read is 600 as of 3/2015.

So presumably you've come here because a story you wrote is in 'Good' or 'Favorites', so congratulations, this particular user thinks that particular story is in the top quarter or tenth of what this website has to offer. You've almost certainly got other stories on my 'Read Later' shelf and can probably expect me to pop up another time or two in your feed.