Investing is the process of growing money overtime. This is based on money invested with the expectation of positive return inform of income. Any money I put in a spectrum with the aim of gaining income as a return is the investment.
Saving on the other hand means keeping money for future use. An investor does not desire to save money, keep money in a place, because it does not yield good results through saving. Rather he invest in good financial services, that will bring a return.