[rapter]

I am new at improvising and like the self expression it gives. I have not yet learn all positions of a major scale but do know the pentatonic scale. Every book that I read about scales mentions something about arppegios. My question is how and why would you use arppegios? I know the intervals that make up a major triad are 1,3,and 5, are these chord tones? Would this be called an arpeggio if you strum each note individually? I don't mean to make this request long and drawned out, but I am getting stale using my ole pentatonic scale, everything is starting to sound the same. Thanks for taking time to read this and thanks again for replies.