Introduction to RSS :

RSS is technology that allows you to access web and blog content automatically. The expansion of RSS is "Really Simple Syndication. Once your browser or computer has an RSS reader on board, you can subscribe to any number of RSS "feeds." A feed is simply a way in which a reader may subscribe to website content - most commonly blogs or news sites. A news site, for example, may list their latest headlines or entire articles in their feed every time a new article is published. A blog would publish this feed as a series of recent posts.

RSS Readers :

Feed readers or RSS readers, are software programs that run on your computer and let you easily subscribe to feeds, and allow you to read through them efficiently. Some are relatively simple, showing the headline and summary. The fancier ones often work with (or in) your browser to make viewing the material look much like the source page. Once you have a reader on your computer, subscribing to a feed with is an easy click or drag from your browser. Sites that provide RSS feeds will usually have a button for that purpose.

Benefits :

1. Users are informed about new updates to the site without the need to manually visit it.
2.It has a great advantage over newsletter because you need not give ur mail address to unknown persons and thereby reducing chances for spam mails.
3.Unsubscribbing is very very easy . Just delete the feed subscription.
4.There are a number of feed libraries from which you can subscribe to your interested topic.

Conclusion :

Hence , RSS is a step towards preventing spam mails and to avoid registering in each and every website to get their news letters.

You do point out some nice things about rss: what it is, and why it's great....but you don't get into the details of some possible negatives.

For example, as a web publisher, RSS has advantages in that you can get people to subscribe to the feeds in the hope that people will visit your site more often....but if you publish full articles via rss, you can easily eat up a ton of bandwidth without gaining any revenue for advertising. However, one way to counter that would be for example to only give only titles or partial articles. Yet another option would be to get a sponsor to pay to have advertisements in your rss feed (like "extra") articles that link to your sponsor.

Yeah, I've used RSS feeds before (recently actually) and they showed my entire articles, even though I put only a portion of it on the main entry. I guess a way around that would be to use the RSS feed to have titles and breif descriptions link to the main and actual articles. That would get people to keep coming to your site, but have the convenience of a single click to get them exactly where they want to be. I also like the idea of ads or something like that mixed in the article. RSS has always annoyed me though because I can't figure it out enough to use it efficiently. Like how to get other people's RSS into my feed viewer. Alot of the times it doesn't work, and sometimes it does. It gets annoying when things like that happen.

so this rss is email news letter replacement ei?
as brian posted this rss may eat all your bandwidth if you have a magnitude of subscriber and misuse, unlike emails which kinda cheap solution and still effective specially in corporate business.

Thanks for your useful information.
Sorry for interruption
I think you can help me, Please see this topic: Rss/atom Feed For Php
Excuse me