Matchmakers are found in plenty in the more traditional countries of the world and provide elite services in the western part of the world. In countries like India matchmaking is purely from the point of view of marriage, but it is different for different countries of the world.
In countries like Singapore, government run, matchmaking services to encourage the citizens to date people with like interest and then decide about marriage in the future. There are many websites for countries in the west that encourage online dating which can also be safely called match making. The matchmaker ensures that the two people who meet have similar interests by filtering out the candidates from the entire group.
A male and a female doctor will be put into the same group and there are high chances that these two will meet and their relationship will take off as they have similar likes and interests.
The filtering can be done on a number of factors and the main reason behind it is to make sure that the people who meet have a good experience with each other. Most of the matchmaking service made millions out of this business which sets up two individuals with one another and then lets them take a call on their future and the future of the relationship.