The most fundamental of Hindu deities, is the Trinity of Brahma, Vishnu and Shiva - popular deities include Ganesha, Krishna, Hanuman and goddesses like Lakshmi, Durga,Saraswati.
Saraswati is the consort of Brahma. Brahma is the creator. Creation is not possible unless the creator has the knowledge of what and how to create. Knowledge therefore is an essential prerequisite for creation. This idea is symbolised by the marriage of Brahma with Saraswati.
Goddess Saraswati is the consort of Brahma, the Hindu god of creation. Scripture says that when Brahma resolved to create this world, he went into deep thought. In the course of his contemplation, there appear a hollowed mark on his forehead. After a few moments there is a girl emerged from that celestial sign. Lord Brahma asked: "Who are you?" The girl replied: "My birth has been from your contemplation. Please give me work." Lord Brahma asked her to live on the tongue of people and regulate their speech as "Vageshwari", the goddess of speech. While Brhma is the lord of creation, Saraswati is the goddess of creativity.She is the personification of wisdom, learning, intelligence, music and art. As the incarnation of speech, she presides over knowledge.