With options, you pay an up-front fee that allows you to sell later. For example, if the stock of a company is $20 a share, and you want to buy 1000 shares for a total of $20,000. However, let's say you don't want to risk $20,000 or you don't have enough money to buy it, then you can consider option. Option allows you to pay an up front fee let's say $1000 that gives you the option to buy later at the price of $20. Let's say the stock price of the company go up to $30, then you can buy them for $20 a share which is a profit of $10 a share for a total of $10000. If the price didn't go up, then your option expires worthless and you lost $1000.