The Tree of Life has always had a strong symbolism in many different eras and times.
The Tree of Life is spoken of in the Christian Bible, a symbol of God's love for Adam and Eve, whose fruits could not be eaten at the expense of the loss of eternal life.
In Egyptian mythology, trees gave green to the isolated expanses of the desert and therefore were seen as a representation of the divine, as if a god wanted to bless that place by giving it life.
Chinese mythology tells of a tree that produced precious fruits, capable of ensuring immortality for those who ate them (the fruit appeared only once every three hundred years).
In Buddhism the Bodhi tree is worshiped, the tree under which the Buddha attained enlightenment.
This tree represents the path to enlightenment and, as such, is the symbol of life.

In the Celtic tradition, known is the oak called Yggdrasil.
The roots represented the underworld, the place where the deceased lived, halfway up the trunk of the tree was the real world or middle world, then there was the upper world of the Asi or deities the place where the brave lived, the earth of heroes. Around the oak were the four directions divided into the region of the mists or Nifelheim, the region of fire or Muspelheim, the realm of the Vani (realm of the forces of development and growth), and the realm of Giants or Jotunheim.

The tree of life is considered the origin of all forms of life,
The roots that reach deeply into the earth, take nourishment from Mother Earth, and are a symbol of family and connection with one's ancestors.
The trunk is life itself that starts from the past and is projected towards a future full of leaves and branches that extend towards the sky, recognizing the Father Sun, the Mother Moon and accepting their energy which is transformed into nourishment.
The fruits are a wish for prosperity and growth of new branches and generations.
The tree of life, a symbol of interconnection with the world around us, is given to wish a full and rich life, like the numerous leaves, and intense just like the ripe fruits.

It is a symbol that is given on the occasion of events that lead to important changes in one's life, such as a baptism, a communion, a confirmation or a wedding are there or an important step in growth, as a gift for a birth or a mother in waiting for your baby, for a job change, if you take a step forward in your professional career, on the occasion of a move to a new home as a symbol of prosperity and new life.

A tree that symbolizes continuity through all generations of one's family; it sprouts from a seed, grows and branches and creates a new fruit that gives life to the next generation, to start over, in continuous expansion
... from our parents and grandparents, to our children and our children's children.