The card of The World is also called The Great One of the Night of Time and is ruled by Saturn. It represents culmination of a major cycle, the realisation of an aspect of wholeness and the beginning of a new journey. 
Saturn is the Lord of Time, and is often seen as a very serious and even forlorn figure in astrology and mythology. The truth is, that Saturn gives one the opportunity to find freedom through accepting responsibility for oneself - there is immense joy and expansion that can be experienced once you discover this for yourself.
When The World appears in a reading for you, it is time to celebrate the completion of a major cycle in your life - a cycle of learning and travelling from a state of innocence to experience. This is a cycle because there is always something new to learn and a new journey upon which to embark. When we master one skill, if we do not then continue our journey of growth, then like all organisms in nature, we atrophy and eventually perish.
Major accomplishments are signified by this card, and yet there is some sadness attending your achievements, because it means saying farewell to a successful phase and then turning your face to the future and the uncertainty inherent in facing new, but no less worthwhile challenges. Relationships may be renewed under the influence of The World, and with this renewal brings a deepening understanding and maturity that is different but no less enjoyable.
Travel is also prominent with this card, as it brings the wider world to your doorstep, and you to it. You are willing to embrace a wider perspective, and often this means exploring and embracing new cultures, ideas and territories. This brings much growth and can open your eyes to the boundaries you have been living within while being unaware that there is so much more that you can be experiencing than you have allowed yourself until now.
And of course, there is the possibility of expanding your philosophies about life and everything in it. The World is your oyster so start exploring!
Image from "The Stolen Child Tarot" © Monica Knighton