Spell casting can help you attain a desire or intent. A spell channels energy from a deity through spiritual intermediaries to reinforce your want in the universe.
Spiritual intermediaries are needed since direct communication with a deity or the supreme being is dangerous. Examples of spiritual intermediaries include ancestral spirits.
Each deity and spiritual intermediary has a set of rituals, ceremonies, and sacrifices that need to be performed before they can grant a persons want, need or desire.
Spells are categorized by need for example, a spell that grants money is known as a money spell. A spell that grants a specific love intent is called a love spell.
Not all spells are equal, as much as not all spiritual intermediaries or deities are equal. The ability of the spell caster is also another crucial factor on the outcome of a spell.
Spell casters also use various divination tools or spiritual systems from voodoo, wicca, hoodoo, occult, and many more. All these are just tools to achieve an outcome.