Odds in Blackjack
Blackjack is a game where you can improve your odds of winning by developing a deep understanding of the game. Unlike a game such as roulette, where it is really a game of chance, blackjack is a game of skill. The house only has a small % advantage compared to other games, and with a thorough understanding of doubling down and splitting pairs, amongst other things, you can increase your odds of winning even more.
Also in blackjack, the dealer is forced to hit up to 17, whereas the player has no such restrictions. The house gains the edge in that the dealer turns over their "hole" card after all of the players have taken their turns. So statistically, more people than not will have busted by the time that the dealer plays their hand, so the house maintains a microscopic advantage over the players.
Blackjack is certainly a game in which a player benefits from having an understanding of the odds. If you understand the odds (and most importantly, the situations in which you are best able to maximize your odds of winning), you will have a much better chance of winning over the long-term.
If you are planning on playing for a few dollars at the casino on your next trip to Vegas, then a thorough understanding of blackjack odds might not be necessary. You are just looking to have some fun, and might not be overly concerned with the concepts of insurance and surrendering.
However, if you are planning on becoming a serious or semi-serious blackjack player, then you MUST understand the odds. If you don't, then you are literally leaving money on the table.
Spend a couple of days and bring yourself up to speed - it will be well worth it in the long-run.