An RSS feed (Really Simple Syndication) is a web feed format that enables users to receive updates from websites in a standardized way. It allows publishers to syndicate content automatically, offering users a quick way to access articles, blog posts, or news updates without visiting the website directly. Users can subscribe to RSS feeds using feed readers, which aggregate the content from multiple sources in one place. This provides a convenient way to keep up with various topics of interest and enhances user engagement with the content published by their preferred sources.