Purification is the process of removing impurities or contaminants from a substance, making it cleaner and safer. This can apply to various materials, including water, air, and even food. Techniques for purification can include filtration, distillation, and chemical treatments, depending on the specific substance and the desired level of purity. In many cultures, purification also has spiritual or ritual significance. For example, in religions like Hinduism and Buddhism, purification rituals are performed to cleanse the body and mind. These practices often involve water, incense, or other elements believed to have purifying properties, promoting a sense of renewal and clarity.