A will is a legal document setting out directions on how the property of the person making the will shall be distributed upon his/her death.
IF you die without having made a will, your property will be divided in accordance with the rules as set out in the Succession Act, 1965. The rules must be applied strictly regardless of the needs or financial circumstances of your next of kin.
It is advisable to make a will if you are a parent with young children or if you have any long term dependents so as to allow you appoint Guardians to care for your children after your death ensuring that custody of your children is granted to the individuals you prefer.
You can make a new will as often as you like. Your will only takes effect on your death. Your property remains yours to do what you wish with it during your lifetime.
A marriage will cancel any will previously made whereas a divorce will not. You should review your will in both situations.