The importance of reciting Kaddish for the deceased:
The mitzvah of honoring one's parents
Observing the commandment of honoring one's mother or father comes down to the reciting of the Mourner's Kaddish during first 12 months following their death. The mourner needs to do his best not to skip even a single Kaddish.
Reciting Kaddish is one of the duties prescribed by Torah that sons need to observe after a parent's death as a part of the commandment to honor one's parents. Honoring one's father after his death is considered even more important then during а parent's lifetime because the father may have forgiven or put up with some disrespect. However, neglecting the precept of saying Kaddish is quite hard to tolerate which is why the son owes it to his faith to recite Kaddish as prescribed by Torah.
Our mission is to benefit Jewish community and to spread unconditional love among Jewish people. As our wise men say, all Jews are responsible for one another. This means that every Jew owes it to the whole Jewish community to make sure his fellow brethren are observing the Commandments.
This responsibility is significant both from ethical perspective and as a practical halakhic prescription, a guidance to follow. Nowadays this phrase has acquired an additional meaning and can refer to the responsibility that every Jew takes for the well-being and safety of his fellow Jew.
There is no greater shame then when a son neglects his filial duty and doesn't recite Kaddish for his mother or father. On the other hand, someone who does recite Kaddish observes the mitzvah of honoring one's parents commanded by Torah, helps the souls of the deceased to ascend to paradise and earns them respect in the higher worlds. This is very important to know.
The purpose of Asher Padita organization
Pay attention, dear brethren!
As Shimon HaTzaddik (Simeon the Righteous), one of the wise men of the Great Assembly once said, the world rests on three things: on Torah, serving the Supreme and good deeds.
Whether you are religious or not, we all belong to Jewish community. And it doesn't really matter whether we define our Jewish identity based on secular or religious terms, because our innermost identity is always the same.
If you deeply think about it, it's easy to realize that we all pursue the same goals.
We are all striving to live in a perfect world no matter what the G-d's plan may be and everyone wants to be loved as much as they love themselves.
However, here's the reason why reciting Kaddish for the deceased parents is so important: it can help their souls and save them from being sentenced to Gehinnom (otherwise known as Purgatory). A son's praising the G-d's name during Kaddish recitation in this world can help his parents tremendously in the other world by multiplying their merits.
Kaddish is recited to commemorate virtuous and pious parents as well as those who died for Kiddush HaShem and made sacrifices in the name of Judaism and the Supreme. And even though they're guaranteed HaOlam HaBa («the world to come»), their souls will be fulfilled and will ascend even higher if their sons recite Kaddish for them. Quite understandably, it is even more important to pray for parents who have sinned a lot to mitigate the Gehinnom punishment.
This applies even to those who have committed suicide, even though the wise man say they shouldn't be mourned at all and they won't have a place in HaOlam HaBa. However,reciting Kaddish for such people will help to redeem their souls.