Watch the Accents online guitar lesson by Chris Buono from 60 Electric Guitar Techniques You MUST Know
Accenting is a dynamic phrasing tool that calls for you to play something a little or a lot louder. Dynamics such as accents are what make music sound alive. Without it, you and the music you're playing would sound dull and flat and that can't happen. The degree in which you attack the strings when accenting is up to you. Listen to what you're playing, and more importantly listen to what's being played around you. Go with your instincts and accent away!