Split face cards are a popular strategy in blackjack, and there are a few reasons for this. First, splitting face cards can create favorable hand combinations that are harder for the dealer to beat. For example, splitting an ace can give you a two-card hand that is worth more than a single card would be, while splitting a two can give you a three-card hand that is worth more than two cards would be. Second, splitting face cards can help you avoid getting stuck with a bad hand.
For example, if you have a jack and an ace in your hand, splitting the jack and ace can give you two good hands: a four-card hand that is worth three points and a five-card hand that is worth four points. Finally, splitting face cards can help you improve your chances of hitting the blackjack bonus round. For example, if you have an Ace and a Two in your hand, splitting the Ace and Two can give you a five-card hand that is worth one point more than the original hand.