A question for the people who know about online casino gambling.?

Online casinos normally start the game of blackjack with the players placing their initial bets. Once all wagers are placed, the virtual dealer proceeds to dealing the cards. Online casinos normally start the game of blackjack with the players placing their initial bets. Once all wagers are placed, the virtual dealer proceeds to dealing the cards. Each player is dealt two cards, including the dealer. A "blackjack" is when a player is dealt an initial 2-card hand that produces a 21 as a result of a ten-value card (i.e. a 10, king, queen or jack) combined with an Ace. If a player manages to land such a hand, he wins immediately.

Could you pls explain A "blackjack" is when a player is dealt an initial 2-card hand that produces a 21 as a result of a ten-value card (i.e. a 10, king, queen or jack) combined with an Ace

It would be great if you could put this text in a layman's language.