If you’re planning to drive on the highway in snowy conditions, chains are probably not the way to go. Chains are effective for snowy and icy conditions. However, they’re best for mountain driving at slower speeds and require you to put them on and take them off at the side of the road.
Snow tires, on the other hand, are designed to not only drive on snow and ice but also perform effectively at high speeds on dry pavement. Chains are not a substitute for snow tires but can be a good option to have on hand in a pinch.