RSS readers allow you to collect the articles of specific sources in one app, making it a lot easier to find the content you’re interested in without crawling through a lot of noise. RSS (which may stand for Really Simple Syndication, Rich Site Summary, or one of several other possibilities — nobody seems sure) has been around a while, having been first developed in 1999, although it wasn’t more widely adopted until a few years later.
That’s why I like reeder on Apple devices.
Instead of needing yet another service to subscribe to RSS feeds and have them sync + potentially pay a fee for service, Reeder allows users to subscribe locally and sync it to iCloud across all devices. It was and is a major appeal of the app compared to others in the Apple ecosystem.