At its core, this exercise is nothing more than selecting two root notes, and perpetually bouncing back and forth between them while building a different triad each time. This leads you to look into new inversions, alternate voicings and just generally increase your chord knowledge.
Unfortunately, this exercise is so simple and easy that I can't really stretch this article much further than this. For examples and additional tips, check out the following video:
Thanks for reading/watching, and I'll see you guys next time.
By Kevin Goetz