There are many, and varied, stories about brooms.It would seem that a broom is capable of all sorts of magic. It isn't! It is merely a symbol.
In days of old, every household would have a broom, to clean the house! The shaft was usually cut from a straight branch; and the "bristles" made from twigs of the bush Broom.
Eventually, the Broom became the symbol of a good housewife; a symbol of "the home".
A young bride would be given a present of a "new broom" made by her new husband.
It didn't take very long before a Broom became a symbol of what we now call "marriage"; hand fasting! When the couple would hold hands and leap over the fire, and then "jump over the broomstick".
These days, most witches will use a broom to "clean" an area where they are going to practice.
Does a broom keep spirits away? Some think it does. So why not hang one by the door? It cannot do any harm!