Indian marriages are deemed almost necessary in the Indian society. Arranging a marriage is the responsibility of Indian parents and other relatives of both bride and groom. Indian Marriage alliances entail some redistribution of wealth as well as building and restructuring social realignments, and, of course, result in the biological reproduction of families. In India there is no greater event in a family than a wedding. In arranging and conducting of marriages, the complex permutations of Indian social systems best display themselves. Some parents begin marriage arrangements on the birth of a child, but most wait until later. Essentially, India is divided into two large regions with regard to Hindu kinship and marriage practices, the north and the south. Additionally, various ethnic and tribal groups of the central, mountainous north, and eastern regions follow a variety of other practices. Re-Marriages in India. Rules for the remarriage of widows differ from one group to another. Generally, lower-ranking groups allow widow remarriage, particularly if the woman is relatively young, but the highest-ranking castes discourage or forbid such remarriage. The most strict adherents to the nonremarriage of widows are Brahmans. Almost all groups allow widowers to remarry. Many groups encourage a widower to marry his deceased wife's younger sister (but never her older sister). Finding the perfect partner for one's child can be a difficult task. People use their social networks to locate potential brides and grooms of appropriate social and economic status. Increasingly, urban dwellers use classified matrimonial advertisements in newspapers & searching online matrimonial sites. The advertisements usually announce religion, caste, and educational qualifications, stress female beauty and male (and in the contemporary era, sometimes female) earning capacity, and may hint at dowry size.