what's RSS feed?

Philippines
May 29, 2009 5:07am CST
i often see this RSS feed at the bottom of some sites.i wonder what's this all about. i was also asked once when i opened my blog. do i need to subscribe it.is is free. i don't have any idea about it.
1 response
fizanali
@fizanali (478)
• Pakistan
29 May 09
I forgot what it stands for but if you subscribe to a blog's or websites rss then you will remain updated to the latest stuff on that site/blog through email.
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