It is a study of the mystical relationship between numbers and life events. It is a logic-based science rather than a predictive science.
The basic difference between these two is that- the Major Arcana cards talk about the long-term situations while the Minor Arcana cards deal with our current situations or day to day happenings.
Each of the four tarot suits consists of 14 cards. Awareness of tarot numerology can help one read the cards more intuitively.
Gaining knowledge about numerology can assist one to read the cards in a much better way as then he/she has a deeper understanding of the meanings behind them.