RSS - all what you can tell me about that!

programming
1

hi guys.
well want know all you can tell me about RSS.
im a web designer and i want know how i can use RSS for my sites and the advantages of RSS inside my site.

i have some questions like:

  1. what its RSS?

  2. advantages of rss?

  3. how i can used?

  4. where i found a tutorial?

  5. if i need a special application for make RSS?

  6. how i can put rss into my site html?

thanks!