We'll try to explain things a bit easier. Calls are very similar to having a long position on a stock. Buyers of calls hope that the stock will increase substantially before the option expires, so that they can then buy and quickly resell the amount of stock specified in the contract, or merely be paid the difference in the stock price, when they go to exercise the option.
Puts are very similar to having a short position on a stock.
Buyers of puts are betting that the price of the stock will fall before the option expires, thus enabling them to sell it at a price higher than its current market value and reap an instant profit. All of this must occur before the maturity date, also known as expiration date . It should be noted that an option gives the holder the right to do something, you are not required to exercise if you do not want to or if the terms are not favorable.