Friction is used all the time. For example when you walk, open a door, handle a bar of soap, dial a combination lock, take our your keys, press the gas and brake pedals, running, grasping food, etc.
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1.It makes wear and tear of object.
2.It need more energy.
3.It produce heat in machinery parts.
well the best way to express the role of friction is that it helps us in walking and holding things.