What is RSS / a feed?
RSS is commonly known as "Really Simple Syndication" and describes a technique allowing you to subscribe to "feeds", ie new and frequently updated contents of a website which you can read/view using other programs.
More details on RSS can be found on wikipedia.
Subscribe to Weidmüller RSS feed
RSS feeds are supported by many Web browsers such as Internet Explorer 7.0 and Firefox (most of today's standard browsers feature RSS functionality) and e-mail programs. You only need to subscribe to a feed and your browser's RSS reader will take care of the rest.
You can also use a seperate Feed Reader program to be independent of your web browser.