Many people confuse alignment with balancing, but they are two different services. Balancing ensures the even distribution of the car's weight on each wheel separately and is necessary after every tire change and not only. If you feel the steering wheel "shaking", then your vehicle needs immediate balancing, otherwise you will feel annoying vibrations while driving. More generally some of the benefits of balancing are that it prevents rapid tire wear, increases mileage and of course you no longer feel vibrations, thus achieving safety and comfort while driving.