[Lead Moderator]

If you go to the "Latest Posts" page, you can set it to be by Threads or Messages. Some people use the Messages view, which lets them see which threads are getting replied to recently. Every time someone replies to this thread, it goes right back to the top of that listing, and new people can see it there. (This is why some people reply to a thread with BTTT, meaning "Bump to the top").

[Letitring]

Well my goodness, I had wondered about this, myself. Thank you so much, for the explanation. :)