Vishnu Pooja, also known as Vishnu Puja, is a Hindu religious ritual and worship practice dedicated to Lord Vishnu, one of the principal deities in Hinduism. Lord Vishnu is often considered the “Preserver” or “The Sustainer” and is a central figure in the Hindu trinity known as the Trimurti, which also includes Brahma (the Creator) and Shiva (the Destroyer).

Vishnu Pooja is an integral part of Vaishnavism, one of the major sects within Hinduism. The worship of Lord Vishnu is performed in various ways, depending on individual preferences, traditions, and the specific context. Here are some common elements and practices associated with Vishnu Pooja:

1. Idol or Image of Lord Vishnu: The central focus of Vishnu Pooja is an idol or image of Lord Vishnu, often accompanied by his divine consort, Goddess Lakshmi, and other associated deities.
2. Offerings: Devotees offer various items to Lord Vishnu, such as water, milk, honey, ghee (clarified butter), yogurt, sandalwood paste, flowers, fruits, and tulsi leaves (holy basil). These offerings are made as a sign of devotion and respect.
3. Abhishekam: This is the ritual of bathing the idol of Lord Vishnu with liquids like milk, water, and other sacred substances. Abhishekam is believed to purify the idol and symbolizes the cleansing of one’s sins.
4. Aarti: Aarti is a ceremony in which a tray with a lit lamp is waved in front of the deity as a gesture of respect and to drive away negativity.
5. Chanting of Mantras and Bhajans: Devotees recite various Vishnu mantras and sing devotional songs (bhajans) in praise of Lord Vishnu.
6. Meditation and Prayer: Devotees often meditate on Lord Vishnu, seek his blessings, and offer personal prayers.
7. Fasting: Some devotees choose to fast or abstain from certain foods on the day of Vishnu Pooja as a form of austerity and devotion.
8. Visiting Vishnu Temples: Many people visit temples dedicated to Lord Vishnu to perform Vishnu Pooja, especially on auspicious occasions and during festivals associated with Lord Vishnu, such as Vaikuntha Ekadashi.

Vishnu Pooja can be performed on a daily basis, particularly by followers of Vaishnavism, or on special occasions and festivals. The level of detail and complexity in the worship can vary from a simple offering of water and heartfelt prayers to elaborate rituals with a trained priest officiating. Regardless of the form it takes, Vishnu Pooja is a way for devotees to connect with Lord Vishnu, seek his blessings, and express their devotion and reverence toward him.