I feels as though I should really know how to do this by now and I really haven't attempted to sidechain yet because I'm quite confused on setting it up. What I "think" I understand is that I can use a compressor to control an effect like delay, and the compressor is controlled by say a vocal, so when the compressor is relieved from compressing the vocal it will open up the delay, so I can have a nice delay at the end of a verse for example instead of it just laid on thick through out. I have always done this with automation, but would like to expand my abilities and frankly just end the confusion whether or not this is something I'd use or not. Thanks for any help.
BTW....I did a search for sidechain, sidechaining, and side chaining...........and nothing even close came up

I was going to google this, but would like to hear from people using Sonar specifically.
EDIT: I feel as though my main problem is the wiring of the whole thing. I use busses, but only to send multiple tracks to and really feel like I'm missing out on some creative ways to use Sonar.