They can be used to harm or to heal, so if you create a poppet of a person, anything done to the poppet will affect the person it represents.
Poppet magic is one of the finest and most practical uses of sympathetic magic. It’s been around for thousands of years, and is still used by practitioners today for healing, protection, prosperity, and other needs.
The poppet is simply a doll. Although TV-shows and movies typically show poppets as the stereotypical ‘voodoo doll’, poppet magic is so much more.