European Style
European-style options can only be exercised on the specific date of expiration. Because there is no risk of early exercise, these options are easier to price using models like Black-Scholes.
They are typically used for index options and certain over-the-counter derivative structures. The restricted exercise window simplifies the management of the position for both the buyer and the seller.
Understanding that European options eliminate early exercise risk allows traders to focus their strategy on other factors like time decay and volatility. It is a standard and predictable feature of index-linked financial instruments.