They are a technology to obtain information published on Internet sites.
The information in promovacanze.it are nothing more than deals and last minute published on the portal by the various structures affiliates.
As an example to make it more intuitive use of RSS can say that is how to subscribe to a magazine, the related promotions and offers come directly into the computer (and more precisely to Favourites browser) where update and whenever a public facility to a new offer RSS update automatically and in this way can be accessed without necessarily fall into the portal or the site of the structure itself.
Now to obtain the RSS with the latest generation browsers (Firefox, IE7) is very simple and intuitive, but for those still not usasse these navigators
will be enough to install on your computer software for reading Rss.
After installing the program must include xml sources from which you want to download the new Rss.
Some examples of freeware software for the use of RSS
RSSOwl (Windows - Mac OS X - Linux)