Clear Debris is a feature in Spaceflight Simulator that removes uncontrollable (without a capsule or probe) parts and rockets (i.e. spent stages, boosters, dead satellites, crashed landers, etc)
Advantages[]
Clearing debris can help the game run faster and smoother, also avoiding confusion when trying to find a rocket.
Disadvantages[]
clearing debris can also remove uncontrollable rockets that you do not want to be removed. For instance, hinges, cargo doors, loose space station modules, etc.