The Mezuzah signifies the sanctity and blessing of the Jewish home. The Torah tells us in Devarim 11:20-21 that the reward for keeping the mitzvah of mezuzah is long life for us and our children. In addition, we are taught that the mitzvah of mezuzah guards one's home from harm. Due to the holiness of the mezuzah and because the mezuzah represents our commitment to HaShem, the custom is to kiss the mezuzah whenever passing through a doorway.

The mezuzah case (with the scroll inside) should be affixed firmly to the upper third of the doorpost on the right hand side of the door as you enter the room, angled towards the inside of the house. Before attaching the mezuzah, a blessing is said "Blessed are you Adonai our G-d, sovereign of the universe, who makes us holy with the mitzvoth and commands us to affix a mezuzah ".