Halloween, or Dias de los Muertos, is a very important holiday for Mexicans. On this day long awaited by the Mexican population, the native people of the place prepare their home with decorations and memories: skulls, candles, pan of the dead, flowers, incense, water, and photos of the missing person.
Water is indicating the purity of the soul. The flowers together with the other objects are used by souls to show them the right way home, to spiritually reconcile for that day with loved ones who are still living their earthly life.
The set of all these adornments, in Mexican, is called ofrenda. The phrase "people die only when they are forgotten" comes from the Mexican tradition, where only the lack of memory of a missing person causes his actual death, with the departure of his soul.