Dynamics in music refers to many things, namely how loud or soft the sound you are producing is (I prefer to use ‘strength’ instead of ‘loudness’ because it connotes a presence instead of something harsh, unless that’s what you are going for).  Dynamics are going to come exclusively from the right hand so a good exercise is to practice picking a single note and start as quietly as you can.  Next, increase your picking strength as gradually as possible until you hit the ‘threshold point’ where you are no longer creating any more volume, and then back down to quiet again.  This exercise helps you intuitively find the spot where you can pick strongly without creating a harsh tone.

Last time I noted how dynamics are produced in the right hand, and a picking exercise that will allow you to understand the threshold of dynamics.  Playing dynamics in music is often turned into the phrase ‘musicality’ (although this includes other conditions like timing and feel) because most times its difficult to describe how to play them properly.  Try describing the color red to someone and you’ll understand.  There are some general tendencies that will occur, and I encourage you to explore them.  An obvious example is a single note line that is ascending (going up) – usually in scale steps.  The most obvious choice is to increase in strength from the bottom to the top of the line, so that your top note is an obvious climax.  If this is not obvious to you, I encourage you to try it and you’ll see what a difference it makes in the sound.  As always, notes are only a part of music, so take the time to develop the other areas.