What size is your run? How many chickens will be on it? How well does it drain? What is your climate like, mainly wet or dry? We are all different so different things work for different people.
Moisture is going to be your biggest issue but there are a lot of different things that factor into that. A wet run is likely to be a stinky run but chicken density has something to do with that. Wet poop stinks when it gets wet because it is decomposing anaerobically. The same thing happens to a compost pile that is too wet. Also a wet coop or run is a dangerous coop or run because certain disease-causing bugs can thrive in the wet, especially if it has chicken poop in it. When the weather sets in wet it is difficult to keep a larger run really dry but you need to do the best you can.
My run is just dirt but it is fairly large, plus they have a 45’ x 90’ area in electric netting they spend a lot of time in. The poop density isn’t all that bad so it does not get that bad when it does get wet. It drains fairly well but they dig holes for dust bathing and it can get pretty wet in wet weather. Luckily it does dry out fairly fast when it quits raining.
If you have a small urban coop and run the odds are you will need to do some poop management, at least more than I have to. The poop load with them pooping in a small area will require something. There are different ways to handle that. Some people cover the top and sides of their run to keep it dry. Some people use sand to build it up higher than the surrounding area so water will drain out. If the poop load is high enough they may be out there regularly scooping it like a kitty litter box. Or they may add a bedding like straw, wood shavings, or wood chips and remove that regularly when it gets too much poop or it starts to break down itself and start to stink. If you go that route you need some way to dispose of it, maybe a compost pile or bag it for trash pick-up. On the other hand if the run drains well and they live in a drier climate they may use the run as their compost pile, filling it with leaves, grass clippings, stuff from the garden or kitchen wastes. With the chickens constantly scratching in it for good treats, they keep it turned well enough it can stay dry enough, but that calls for a well-drained run and a fairly dry climate. If your run is situated in a low spot where water drains to it instead of away from it, you will have to work harder.
We do this all kinds of different ways. You need to find someone that has a climate and set-up close to yours so they can tell you how they manage it. There are all kinds of successful techniques out there and some of them will work for you. The challenge is figuring out which ones apply to your unique situation.
Good luck!