Advanced card counting is a sophisticated strategy used in blackjack to gain an edge over the house by keeping track of the ratio of high to low cards remaining in the deck. Unlike basic card counting, which typically employs simple systems to track running counts, advanced methods may use multiple decks and more complex calculations to refine betting and playing strategies. Players employing advanced techniques often incorporate additional factors, such as betting trends and dealer patterns, to make informed decisions that maximize their expected returns while minimizing risk.