This is the 1st level of Horoscope matching but, this is very essential, this itself is not final matching, you have to check the planetary positions and ensure whether there is any dosham found in it.
For an example:
If a bride has a dosham, the groom should also have similar dosham in his horoscope and vice versa. However, this star matching will be useful for filtering and omitting unwanted horoscopes in the initial stage itself.