We've installed the syndication https://github.com/imorland/syndication plugin, which provides Atom and RSS feeds for each tag on the forums.
If you don't know what syndication/RSS/Atom are, it's basically a protocol which allows you to have a central client or news reader which pulls feeds of articles from various places on the internet and aggregates it into one place for your consumption. For example, you could add a news feed for all "announcement" or all "Botania" posts and have them show up in your own feed reader app of choice. It's an "old internet" thing but still very useful for the people who need it.
Each tag page will have a feed button in the upper right corner next to the refresh button, which will be an Atom feed. For example, for announcements, https://forum.violetmoon.org/atom/t/announcement
If you need RSS, replace "atom" with "rss" in that URL.
Enjoy!