Match making i.e kundli matching in vedic astrology is considered very important before planning for marriage. Horoscope matching is analysis of both boy and girl's natal / birth chart. There are 36 different gunas. For a couple to go ahead with their marriage plan, they need 18 gunas during their horoscope matching.
Kundli matching helps in getting an insight of the marriage's longevity, mental consistency, any manglik dosh, the durability of marriage, tendencies contrary to each other, children, general health, sexual health and contentment during the wedding. It also details physical, emotional and spiritual compatibility of the couple. These factors decide stability, longevity of the relationship.
The most important aspect of Kundli matching is the managlik dosh, i.e. Mars taken into consideration. Mars is an important planet for the success of marriage and good health in both the Kundli.