Option – the right to buy or to sell 100 shares of stock at, a specified, fixed price and by a specified date in the future
Call Option – an option acquired by a buyer or granted by a seller to buy 100 shares of stock at a fixed price within a specified time period.
Put option – an option acquired by a buyer or granted by a seller to sell 100 shares of stock at a fixed price within a specified time period.
A call buyer believes and hopes that stock’s value will rise, but a put buyer is looking for the price per share to fall.
A call seller hopes that the stock price will remain the same or fall, and a put seller hopes the price of the stock will rise.
For option buyers, that movement has to occur quickly enough for that profit to materialize while the option still exists.