All pellet smokers just use wood pellets for their heat, and give off smoke. Same as any charcoal or wood grill. Good quality wood pellets are real wood compressed into small pellets, so it's basically a wood smoker. Some have the ability to have much higher temperatures than others, so if you're in the market for one get one that suits you individually. I have a Pit Boss Series 7, the temp only gets up to around 350, which is perfectly good for anything I want to smoke. Adding an Amazn tube will add more smoke flavor, which many here use. Grab one for $20 pretty much anywhere. The maze one is a bit more, but smokes for much longer. I'd search for one with good reviews, as some have problems and others don't. Traeger is the first, I think they pretty much invented wood pellets, so that's a good start. Many many others have copied and/or made them better. The downside is the expense. Figure about $20 for a bag of pellets, and those last maybe 36 hours or so, which again all depends on what you want to bbq. Good luck, and get ready for tons of amazing food!