It is a superstitious belief that it will protect you from harm
Its a bad luck charm , originating from supposed witches in the 1500's.
Jim received the charm to ward off witches from the hairball that was given to him by a magic man in Chapter IV of "The Adventures of Huckleberry Finn."
The purpose for a charm link would be to hold the bracelet together. They hold together, by linking one to another, to form a circular piece of jewelry called a bracelet, that goes around the wrist.
Well it's very hard to say. They just have this over whelming power to do so...
A charm bracelet is a chain that allows you to add charms to them. The charms tend to represent your relationship or who you are friends with. This also includes your personality.
The purpose of a key charm is purely decoration and preference to add personal style to your key ring. One can find key charms in all shapes and sizes and typically reflects upon a persons personality and style.
The charm Alohomora is also known as the unlocking charm. It can be casted by a witch or wizard to magically unlock - locked items. However, there is a counter-charms such as Colloportus that prevents witches or wizards from unlocking an object through the use of magic.
For his seventeen Ron bought Harry a book titled Twelve Fail-Safe Ways to Charm Witches.
every thing is meant to be for a purpose...
The purpose of the witches at the beginning of the play is to set the scene and introduce the theme of fate vs. free will that is incorporated throughout the entire novel, and it gives an idea of how Macbeth will be affected by these witches. :)
The Accio charm was used by different people during the HP series. The most famous was in "Harry Potter and the Goblet of Fire". Harry was fighting the Hungarian Horntail and he desperately needed something to do. Mad Eye Moody asked Harry what he was good at. He replied that he was good at Quidditch. Therefore, Harry needed his broom. Hermione taught Harry the Accio charm and during the competition, Harry used the Accio charm to get his golden egg.
It should be witches'. Example: Witches' brooms