RSS (Really Simple Syndication) is a format for delivering regularly changing web content. It allows users to subscribe to frequently updated information from websites. Users can click on an RSS icon on a website to subscribe to that site's feed and receive automatic updates. RSS feeds can be used by businesses to automatically push new content to interested users and keep them engaged without relying solely on email lists. When using RSS for marketing, marketers should make sure their RSS links are prominently displayed and that their feed content is updated regularly in order to attract and retain subscribers.