Tarot is intimately associated with the Kabalah and Western occultism. The lodges used Tarot in conjunction with their rites. Any good mapping or tracking device has a legend which tells the meaning of the symbols and the scale used on that map.
With Tarot the” legend” is the Tree of Life. The Tree of Life shows how Tarot is used. The four worlds, the four elemental powers or suits all relate to the Minor Arcana, the pip cards relate to each of the Sephira on the Tree. 4 x 10 is 40. The Court cards are 4 x 4 or 16 and are an aspect of the Tree as well. The 22 Major Arcana are aligned with the lines or paths joining the Sephira on the front face of the Tree.
The function of the Tarot as divination can show where a person is in terms of energy by referring back to the Tree of Life. Divination deals with energy of the Body, Mind, Emotions, and Awareness. It is not a means to evaluate romantic relationships or to predict future happening- that is fortune telling which is better handled, i.e. more detailed when using a 36 card or decan deck or a modern set of the Minor Arcana with Court Cards aka a standard deck of 52 “playing” cards not the full 78 card initiatory tool that is the “book” of Thoth.