Joomla RSS Feed Links
Joomla has all sorts of plugins and methods for which to create rss feeds. All in all, the RSS feeds will have a specific url like http://example.com/Subscribe-to-blog-rss-feed.html
Once you have the link, you can use it on your page to allow your users to subscribe to your feeds. If you have good, regular content, it is a simple method to allow your subscribers to keep up to date.