DO YOU KNOW:- WHY DO JEWS PUT STONES ON GRAVES?

For the Jews, the practice of leaving stones or leaves on graves is one of the oldest, and its origin is unknown. It is a custom or tradition, rather than a commandment, and over time many interpretations have been given to this practice. For a general explanation of this custom, see Warning to the Canaanites/Kohanim (Jewish Priests)
During the times of the Temple in Jerusalem, Jewish priests (kohanim) became unclean if they stepped within the four feet of a dead body. As a result, Jews began to mark tombs with groups of rocks to indicate that they should rest.

To Keep the Soul in This World It is said that after a person dies, their soul continues to reside for a time in the grave where they were buried. Placing stones on a grave signifies that the soul continues to exist in this world, which some people find comfort in. Another interpretation suggests that stones keep demons and golems away from/Leaving graves.

Stones Last Longer Than Flowers, although beautiful, eventually die. A stone will not die, and can symbolize the preservation of memory and legacy.

Rabbi Simkha Weintraub, rabbinical director of the New York Jewish Healing Center, offered another traditional interpretation: “The Hebrew word for ‘stone’ is tz’ror — and it so happens that this Hebrew word means ‘bond.’ In the Raamim prayer (and sometimes) we pray that the deceased is ‘bound in the bond of life’ — tz’ror haHayyim. By placing a stone, we show that we have been there, and that the memory of the individual lives on in and through us.”

Many people take special care in choosing a stone to place on the grave of a loved one. It may be a stone from a place that was significant to the deceased, a stone that was chosen in an event that the gravedigger was particularly missed, or simply a rock that you find attractive. Because there is no commandment to fulfill here, placing a stone on a grave is an opportunity for you to create your own ritual, or to do things in a way that feels meaningful to you..