Blackjack Basic Strategy, played perfectly in a game with favorable rules, will reduce the edge against you to about one half of one percent, the best odds of any game in the casino.
But still – it’s a negative edge. While you can win in the short term on any given day, in the long term that one half percent edge against you will eventually grind you down if you play long enough and frequently enough.
An advanced basic strategy – or what we call Basic Strategy Plus – is necessary for you to step up from being a casual player to being a serious recreational player who has a better chance of winning over the long term.
To reduce the small edge against you with Basic Strategy even further, and at times even turn it into a positive edge in your favor, you simply must pay attention to the cards on the table and develop some sense of the proportion of high cards versus low cards remaining in the deck. This is exactly what a card counter does.