What is RSS Feed and Why we use them?

RSS (Rich Site Summary) is a format for delivering regularly changing web content. Many news-related sites, weblogs and other online publishers syndicate their content as an RSS Feed to whoever wants it.
Benefits:
1.Hurricane Watch. If you live in "hurricane alley" of the USA, you want to pay close attention to hurricane warnings and evacuation tips. RSS is absolutely a good tool here.
2.News. Get the freshest news on your favorite celebrity, the country you are about to visit or your favorite sports team.
3.Hobby interests. If you are a motorcyclist, a skier, a pottery enthusiast, or perhaps a dog trainer, hundreds of conversations and bits of hobby advice can be fed directly to your screen.
4.Photos. If you like to change your computer wallpaper daily, then RSS feeds are an excellent way to get the latest from photographers on the web.
5.Reading your friends' blogs. If you have loved ones around the globe who blog, then you can have all their latest entries fed directly to your screen. This is helpful for families when one of their relatives is in the military.

Politics. If you are helping a political candidate get elected, then RSS is an invaluable tool for watching popular opinion and blog postings.
Jokes and inspirational quotes. Add a laugh to your morning or a pick-me-up quote from a famous person.
Currency Exchange Rates. If you are planning a trip to another country, you can watch for the best time to buy that country's currency.

RSS (Rich Site Summary) is a format for delivering regularly changing web content. Many news-related sites, weblogs and other online publishers syndicate their content as an RSS Feed to whoever wants it.

It is a way to easily distribute a list of headlines, update notices, and sometimes content to a wide number of people. It is used by computer programs that organize those headlines and notices for easy reading