RSS feed readers basically let you follow websites as if they were social media accouhts.
On RSS apps you put in a feed address (for example my Fediverse profile's feed is https://mstdn.social/@feditips.rss) and whenever a post is added to the feed it will appear in your reader.
By adding/following feeds from interesting sources, you will end up with a timeline of interesting articles. So, it's like curating your own news service.