Blackjack, online or in a casino, there are some basic things to keep in mind.
The object of the game is to get closer to the 21 to occur without over 21 to
go, then the house, or the dealer. Around All cards have a face value, all face
cards are valued as tens and Aces can be seen as one or eleven.
If you're a "Blackjack" or "21" get, you get three in a paid or "time and a half" if the dealer is not itself a "Blackjack" or "21" has. If this is so, it is a "push" or tie. A "Blackjack" or "21" is when your first two cards are an Ace and a card with a value of ten are. If you get a "blackjack" and the dealer's up card is an Ace, you have to accept the most likely option "Even money" which means that you can decide not to find out if the dealer / house also has a "Blackjack ", but once you take a chance on where you fall on a payment of three late.
There is also a time when you may have the opportunity to take insurance. This means that the dealer is an Ace up card and possibly a "blackjack" may have. By taking the insurance you place a second bet, up to half of your original bet, where you bet that the dealer / house a "Blackjack". If you place this bet, and the dealer has a "Blackjack", you lose your initial bet but get paid two to one on your insurance bet, which means you break even.
The most basic strategy players will say that you should not do this bet, the odds are against you if you bet on the dealer / house a "Blackjack". There may be other players at the table, a table or an online casino table, those players just play also against the dealer / home so you do not have to worry about the outcome of their hands, do not worry you only play against house / dealer.