There are many types of Boggarts which vary from hall knockers to dangerous rippers.
They can be bound in a pit or finished off with salt and iron
According to folklore, Boggarts are said to have been brownies at first and when mad become boggarts. Boggarts are said to delight in tormenting those they once protected and are extremely annoying.
They can choose whenever or not to make themselves visible and can be repelled by iron and salt.