RSS (most commonly translated as "Really Simple Syndication" but sometimes "Rich Site Summary") is a family of web feed formats used to publish frequently updated works—such as blog entries, news headlines, audio, and video—in a standardized format. ( source Wikipedia)
RSS brings information from multiple Websites to a single page through a "reader" to you on various platforms you can chose from. It's is great because isntead of you seraching for information from sources, the information that your request will come to you.
The Ottawa Convention Centre has established RSS feeds in many areas of the website so that only information you want will be sent to you and not all updates made to various areas of the website that you may not be interested in.
There are many readers to chose from including Outlook and this comprehensive list of readers