well when i ask my mentor what shredding is he said to me that shredding is a style of music played in most metal genre(usually involves lots of arpeggios sweeps and Dive bombs(i think). u can hear most shreds in vai, malmsteen and in dimebags.
Here's a term for you
sipra= meaning to learn the song by ear
For the love of music not for the love of money!!! :D
:p