Counting cards can be a useful strategy in both land-based and online blackjack as it helps the player in knowing that the card which are present in the deck are rich in high or low. If in case the cards present in the deck are rich in high cards then the player has better chances to reach to 21 or near to it. In such cases, you can raise your bet. And if in case your deck in rich in low cars then reduce your bet and even try to back down the table to the minimum.
The best thing about the Hi-Lo system is that it is the easiest method to learn and besides this it is also a good system to begin with.
The main feature of this system is that it is a balanced system, which means if you are starting the count of the deck at 52 then you may also reach to 0 when you are over with the bet. The main thing is that it helps in the assignment of the positive and negative values which helps the player in determining whether the deck is rich with high or low cards.
