Spousal support is money that is paid by one spouse to another as financial assistance to ease his/her inability to maintain a standard of living similar to the standard of living that was enjoyed during the relationship or to lessen some financial disadvantage that one spouse experienced as a result of something that happened during the marriage or its breakdown (such as staying out of the workforce for years to raise children or moving around the country/world to further the others career).
How much? How Long?
Whether or not a spouse is entitled to support is the first issue. Then how much is paid for how long is another. There is a great deal of discretion in determining spousal support and amounts and durations vary significantly.