Typically a higher savings rate, the fraction of GDP not consumed today, results in higher investment rates. Thus, the more a society invests (and saves) results in more production opportunities in the future, implying a higher rate of growth.
Saving can therefore be vital to increase the amount of fixed capital available, which contributes to economic growth. However, increased saving does not always correspond to increased investment. In the short term, if saving falls belowinvestment, it can lead to a growth of aggregate demand and an economic boom.