Zakat is the third pillar of Islam, and it refers to the practice of giving a portion of one's wealth to those in need. It is one of the five pillars of Islam, and it is considered an important act of worship and a means of purifying one's wealth. The amount of zakat that one is required to give is usually 2.5% of their annual savings or wealth, which is distributed to those who are poor and needy, and cannot support themselves. The concept of zakat is based on the principle of social justice and caring for the less fortunate, and it is believed to be a means of gaining the pleasure of Allah and earning rewards in the afterlife.