system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How exactly does counting cards work and how does it level the playing field against a casino or improve one's chance of winning?
gpt
Counting Cards is all about keeping track of probability.

Let's say you're playing blackjack. And the first five cards that are dealt are relatively low (let's say less than seven).

If you keep track of this, you know that the probability of drawing a high card is larger than normal because several low cards have already been played. This information will help you decided whether or not it's smart to hit or pass.