Just like when you want to watch a video clip or listen to music on the web, you need a "player" of some kind to subscribe to feeds. Good news: Most of these tools are free, and there are many to choose from, so you can find the one that best suits you.
The "player" for a feed is called a feed reader. This tool lets you subscribe to any feeds you want, checks automatically to see when they're updated, and then displays the updates for you as they arrive.
Feed readers can run on your computer or you can sign up to use a feed-reader that runs on the web. If you use one of the web-based readers, you can access your feeds from anywhere you go, just by signing into the website that manages your feeds. If you use a feed reading program that installs on your computer, your feeds can be stored for you even if you're not connected to the Internet.