What is centrifugal force?

Centrifugal force describes the sensation one has of being

pushed outward when moving along a circular path. The
feeling of being pushed outwards when speeding round a
corner in a vehicle, or while riding on a merry-go-round, comes
from your preference to move in a straight line. Isaac Newton
showed that all objects have inertia and will either stay at
rest, or move in a straight line, unless a force acts on them.
When you move in a circle there is a force pulling on
you, changing your direction from that of a straight line.
This is centripetal force and pulls inwards. The feeling of
the ‘outward pull’ of centrifugal force is just your natural
resistance to this.