RSS (Really Simple Syndication) feeds are an easy way to keep up with websites without having to constantly visit them. When a website is updated, that site's newsfeed can notify you and give you a link to the new content. All you need is a feed reader (also known as an "aggregator"). Most current web browsers have feed readers built in and will display the feed and/or prompt you to subscribe. You can also use web-based readers or dedicated software.
Select a feed from the list and it will give you the option to subscribe to a number of popular web-based feed readers available. If you have installed a RSS reader software - right-click on a RSS link and choose "Copy shortcut" or "Copy Link Location" to copy the feed URL and then paste it into your RSS reader.