Really Simple Syndication (RSS) is used for transmitting information across the internet and intranets. We can also subscribe to RSS Feeds from SharePoint libraries, lists, and other elements. We can use an RSS Viewer Web Part to display an RSS Feed on a SharePoint site. The RSS Viewer Web Part provides a convenient way to view information from many sources on a single page.

1. Go to the sharepoint site page click Edit Page.
2. Choose a zone for the Web Part, and then click Add a Web Part in that zone. The Add Web Parts Web Page dialog box opens.
3. In the Add Web Parts dialog box, here select the Content  Rollup Web Parts, select the RSS Viewer webpart  check box, and then click Add.