Purification refers to the removal of impurities or unwanted influences, toxins, filth, negative energies, etc. in order to leave a pure or at least less polluted product. Many magical practitioners engage in purification ceremonies before performing magical work. They may purify themselves, their tools and/or their ritual space in order to begin their magical work with a clean slate.
As water may be purified by boiling destroy bacteria, filtering to remove sediment or heavy metals or distilled to remove virtually everything but the water, magical practitioners use a variety of means to purify their space, themselves and their tools and other materials. Some methods include asperging, smudging or fumigation, the use of salt, and ritual baths.