Options are Derivative instruments.
Derivatives are financial instruments derived from other primary financial instruments or securities. These instruments are treated as contracts and thus are time specific.
An Option is a derivative of shares. An Option contract is created out of an underlying security and such a contract itself will be traded for a value.
An Option contract gives the holder of such a contract a right to buy or sell the underlying shares at a specified price called Strike Price whenever the holder of such a contract decides to exercise the Option Contract.
To purchase such a contract an investor has to pay a price called Premium.
When such a contract is sold by an investor he or she receives Premium.
This is an advanced concept in Investing that may not be suitable for all kinds of investors.