With RSS it is possible to distribute up-to-date web content from one web site to thousands of other web sites around the world provided you have an RSS subscribe button on your website.
RSS is vital for dynamic sites (which have news and product updates) but a static site does not essentially require RSS .
News feeds and RSS feeds represent one of the main ways to deliver content daily to the reader. So, if you have a personal blog, a company website or any kind of website that you want to make public and share it with the world, you should consider adding another partner to your team: the RSS or news feed.