The need of money is always increase, even tough you have a great job with great salary. Tomorrow is a mystery and you should prepare your self for something bad that maybe happen to you financially. You can save your money at bank to get interest every month.
The interest will increase your saving amount. But if you look the interest rate, you will understand that your increasing money is very little if you compare with the increasing prices. Investment will give you better option for your financial future.
Investment is putting money in order to get profit for it. You can use your money to buy land. After development in the area, you land price will increase, if you sell it you will get profit.
You can use your money to buy precious metal like gold or silver, these metal price is tend to increase by time, it is also profit. The other option for investment is buying financial product like shares, bonds, treasury bills, certificate of deposit, annuities, etc.
If you want to invest your money, you should understand the rules and risk form every investment. Some investment like shares will give you faster profit, but also very risky for wrong analysis. Some investment like land and property is slow profit but safer and more stable. It helps to save pennies and learning how to invest is essential.