Okay hey frnd i could help u in a nice way coz my science fair topic is also friction....
1. friction is used manier times in our daily lives.
2. on hills.
3. car moving on any kind of road.
4. clapping ur hands.
5. anything that is moving.
DISADVANTAGES are only 2 according to our research..
1. friction makes the object tougher to move
2. it makes the object slower to move.

hope my answer was useful please hit that brainliest answer button and mark me as the best.
also please press the thank u button