Many websites provide an RSS feed of the content that they post (including this one!). You can subscribe to these feeds using an RSS news reader app to pull all the articles from your favorite sites into one place rather than having to visit each site individually – kind of like an inbox for website articles. Feedly is my favorite RSS reader for Windows/Web and makes it really easy to find sites of interest and subscribe to their content.
For Mac and iOS, Reeder 5 is my #1 choice. Reeder can be linked to a Feedly account so that the two stay in sync. Reeder is where I spend most of my time with RSS but Feedly is a good alternative when working on a PC.
