RSS feeds let you get updates when a website has new stuff. You can subscribe to sites you're interested in and then get notifications about new material instead of checking for it yourself. This works especially well with sites that don't update often.
You should subscribe to my feeds:
Many apps will let you import RSS feeds instead of adding them all yourself. Download my subscriptions to import. After importing, you can delete whatever you don't want.
You should also sign up for my free email newsletter. I'll send you around one email every two weeks.
Most blogs and similar sites have RSS feeds. Usually you can use their home page and the RSS app will find the correct feed URL for you. You can also subscribe to a YouTube channel or podcast.
Don't rely on getting all your info from social media sites. Don't just read whatever's in your Facebook, Twitter or Reddit feed. Choose and subscribe to some sites yourself.