If you want to receive the latest news of the ESSO Website directly on your computer click on the picture (under the tab "ESSO RSS Flux" ) at the left and copy the URL in you reader.

Users of RSS content use programs called feed 'readers' or 'aggregators': the user 'subscribes' to a feed by supplying to their reader a link to the feed; the reader can then check the user's subscribed feeds to see if any of those feeds have new content since the last time it checked, and if so, retrieve that content and present it to the user.
More on Wikipedia. 

How to use it?
There are a lot of RSS reader, you can use you email program like Thunderbird or specialized program. One of them is FeedReader.