Master Numbers are simply extreme of the number they are truly represents as a single digit.
I.e. 11 = 2, 22 = 4, 33 = 6, 44 = 8
Master Number 11 simply represents the energy of 2 and 7 to the extreme. They take Spirituality to the max.
Master Number 22 are known as Master Builders. They are the extreme of 4 and carry the energy of 8 (The Big Shot)
Master Number 33 is a shadow of 6 and 9, as they all about humanity and loving everyone equally, but, to the extreme.
Master Number 44 is simply 8 gone wild. They will do whatever it takes to have what they set out to do.
However, Numerology has its limits, and it can not predict in detail the timing of events, such as marriage, birth of a child, career, promotion, death, accidents, birth. This is when Vedic Astrology far exceeds the speed limit of numerology, but numerology is still important and the easiest way to find out your 'destiny'.
To learn more about the remedies for 1 Karmic number or 1 Life Path number, check out the Astrology Book here.