Contrary to popular belief, Narrator is not a program on your computer to help those with hearing deficiency. It is the voice that comes from the soul of the pc. Its sole purpose is to bring joy by saying, "all your base are belonging to us" or "roflcopter soi soi soi." If you happen to come across a particularly funny lolcats banner, it is critical to type this to the Narrator so that he may heal the wounds of your soul.
"ZOMFG this cat is so funni, lawlz. I need to tell teh narratorz!"
narrator: "o noez. halp. halp. i can't reach teh oranj on guitar haro."
The narrator is the passive voice in the story. He/She/It will usually tell the reader or viewer what is going on and other little tidbits of information the main characters don't even know about.
Some narrators in famous books, movies, stories: The Brothers Karamazov, Fight Club, The Red Death.
Someone who awkwardly narrates every moment throughout sex.
Jay (sensually creepy): Oh yeah, get on that table and bend over like that..yeah.
Cait (what the fuck?): Okay...I'm getting on the table now...You don't have to be a narrator