Congrats on joining the world of the Black Rifle. See the Ammo FAQ for Self Defense ammo info.
Wolf is a Russian ammo distributor. Except for their Prvi Partisan brand made in Serbia, essentially all of their ammo is steel case, Berdan primed, and polymer coated (newer product) or lacquer coated (older product which may still be found in gunstores who don't sell much ammo). The oldest argument, other than which is first, chicken or egg, is whether steel ammo will function properly in our American-made AR-15s. Some say they shoot thousands of rounds without issue, and there's something wrong with your rifle if you have problems. That arrogance does not impress me. Your mileage may vary, and we live in a free country (still).
In my own experience, the only Wolf I will shoot in my DPMS Classic 20 is the Prvi Partisan brass. Why? As my gunsmith told me, the rifle was designed in the USA, and we have, since the work of Horace Smith & Daniel Wesson inventing the self-contained metalic cartridge in the mid 1800s, used quality brass ammo in our American guns. Brass does a better job expanding and sealing the chamber, and the cases, if Boxer primed and made from good spec brass, are capable of being reloaded. I shot about 300 rounds of Wolf Poly out of my AR-15 and suffered a broken extractor, which cost me more for shipping than the cost of the part. In addition, Wolf is loaded (2,700 fps) weaker than American .223, and much weaker than NATO quality 5.56 (3,150 fps). In my humble opinion, Wolf propellent is low quality, and is much dirtier. However, Wolf steel ammo is cheaper than brass ammo from anywhere, including European ammo mfgrs, and that appears to be its saving quality. Again, in my opinion, you get what you pay for, and most importantly, your M&P is much too good a firearm to be fed 86 octane ammo.
What kind of range ammo you get depends on several factors: how you intend to shoot at the range (casual, competition practice, etc) and how much money you have/want to spend. Results are often a factor of cost. If you want to part the hair of a mosquito, obviously you will pay dearly for match-grade ammo. If you will shoot casual target, major brand USA and European FMJ .223 will be cost effective and satisfactory (Federal, Winchester, Remington UMC, PMC, Sellier & Bellot, Dynamit Nobel, FN Herstal.) If you want punch and distance, American NATO grade M193 or M855 from Federal or Winchester are your loads. There are other brands of very good quality, and you will pay for it: Hornady and Black Hills are two that come to mind.
I'm sure everyone on the board is lined up to criticize what I have said. No matter. Read the pinned post info in the beginning of this section, buy a small quantity of ammo at a local gunstore, ask questions while you're there, clean and lube your rifle per S&W's instructions, and take your time when you get to the range. And good luck!