Like jam with bread, so is the couch with cushion. They are one package to complete the comfort--zone to relax and gather with your family--in your house. Without a cushion, the couch will feel less comfortable and attractive; that is why a cushion is considered a sweetener for the sofa.
Most models of the couches are not as many as cushion provides, yet that is multifunction of it. Even if you have an antique vintage sofa or a minimalist white sofa, that does not matter. You can style your room's couch anything with only just cushions; instead, it is boho, rustic, minimalist, or contemporary themed. It affects your room theme. Cushion is not a big thing, but without it, the room will look less comfortable.
Not only couches in the living room, you can also put cushions on outdoor benches, on the floor inside the children's playroom, on your bed, on your work chair, some even have them in the car to keep comfortable while going on a trip.
Because it is considered very effective, practical and has various costs, it has been quite popular nowadays. Now, You can feel comfortable wherever you are!