Celraysoda

Hello! Relatively new to vaping and had some questions. I did some internet searches and figured someone on here could give me simple, one sentence answer...I hope. Story is I quit smoking about three years ago using zero nicotine Red Dragons. I long since gave them away and "accidentally" started smoking Black and Milds. It's been over a week and I'm back to vaping with no issues. I was in the local shop and was asking about mods for a good, thick cloud. I was referred to the iTaste VTR with an Aspire Nautilus tank. On the VTR. Can someone quickly and easily explain the Ohms, volts and watts and the effects of adjusting each one? Much appreciated!