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.
GNU social JP is a social network, courtesy of GNU social JP管理人. It runs on GNU social, version 2.0.2-dev, available under the GNU Affero General Public License.
All GNU social JP content and data are available under the Creative Commons Attribution 3.0 license.