Her ubiquity is demonstrated clearly by the widespread use of the symbol Śri, which represents her and material prosperity. She is seen as the wife of Vishnu, the Preserver, and her avatars accompany many of his (like Sita with Rama and Rukmini with Krishna).
The holiday Diwali is for many a tribute to Lakshmi. Hindus vigorously clean their homes and surroundings, and light them and their businesses up with rows of lights in order to invite the Goddess to visit and bequeath them with prosperity, both material and spiritual. Mothers are seen as embodiments of Lakshmi, as they are responsible for the fortune and prosperity of the household, and are specially honored by their families. Diwali is also a time to recognize important relationships by visiting relatives and friends to exchange gifts and sweets. Lakshmi puja, honoring and invoking the Goddess, is usually followed with Lakshmi ārti. In Nepal, Lakshmi puja is an important component of the five day festival of Tihar. Similarly to Hindus in India, Nepali Hindus celebrate by buying gold, silver, precious stones, and new utensils for their kitchens, and clean their homes to invite Lakshmi into their homes the night of Lakshmi Puja. Goddess Lakshmi is also celebrated during Navaratri, when she is remembered during the fourth through sixth nights of the nine night festival.
Shloka
लक्ष्मीम् क्षीर समुद्रराज तनयाम् श्रीरंग धामेश्वरीम्
दासीभूत समस्त देव वनिताम् लोकैक दीपांकुरॉम
श्रीमन मन्द कटाक्ष लभ्द विभव ब्रह्मेन्द्र गंगाधराम्
त्वाम त्रैलोक्य कुटुम्बिनीम् सरसिजाम् वन्दे मुकुन्द प्रियाम् ॥
Lakshmi Kshira Samuḍra Rāja Tanayām
Śri Ranga Dhāmeśvarim
Ḍāsi Bhũtha Samasta Ḍeva Vanitām
Lokaika Ḍipānkurām
Śriman Manda Kaṭāksha Labḍha Vibhava
Brahmenḍra Gangāḍharām
Tvām Trailokya Kuṭumbinim Sarasijām
Vanḍe Mukunḍa Priyām ||
Goddess Lakshmi, who is the daughter of the king of the ocean of milk,
whose abode is Srirangam with Lord Ranganatha
Who is served by all the divine ladies in heaven
Who is the guiding light for the world
Who has obtained the sustained (continued, everlasting) glance (Grace) from Brahma
Indra and Shiva, whose abode is the three worlds (Bhu, Bhuva, Suvaha) – I offer my prostrations to Thee, the beloved of Lord Krishna (Mukunda)