Every father does Kanyadaan at his daughter's wedding, but there is another donation called Sindur Dan. In fact, Lord Sriram received Sita by breaking Shiva's bow in the Swavara organised by Raja Janak and Sita Ji accepted him as her husband by putting Varmala around Shri Ram Ji's neck.
Then King Janak sent a message to King Dashrath of Ayodhya and then took Barat from Ayodhya to Janakpuri. Then, in the presence of both the sides, in a Vedic manner, between the chanting by the Brahmins, Shri Ram, in demand for Sita, filled the vermilion called 'Sindur Dan'. It is said that marriage is completed only after the donation of vermilion.
Yes, in addition to putting Kumkum (bindi) on the forehead among women, the practice of filling vermilion in demand has been going on for a long time and it is a symbol of their well-being, but at the same time, it is also considered as a marshal. It is said that in astrology, red has been given a lot of importance because it is a symbol of Mars. The vermilion, on the other hand, is red in colour.
Hence, it is considered to be Marshall. It is also called Lakshmi's symbol in the scriptures. At the same time, the vermilion in demand by women begins only after the marriage rites and at the time of marriage, each and every bride fills the vermilion in demand for her bride. On the other hand, it is a major rite of passage in the middle of a marriage.