Abuse Filter allows admins to "blacklist" certain phrases, triggering a warning or in extreme cases a block. These usually mean slurs, swear words and vandalism, but I've also seen them against certain external links, specific categories or bad filenames.
It will register in the log, but admins have to check the log manually. It does not notify admins.
We use AbuseFilter on CC to also flag normal edits. So, for your case, all new forum posts are tracked and we can get a list of all new forum posts here: https://community.fandom.com/wiki/Special:RecentChanges?tagfilter=New