Basic Strategy is the single easiest blackjack strategy tool that can be used. Basic strategy can be used for blackjack in a brick and mortar casino, and also for online blackjack. This is because it is based on the basic rules of the game, making it a versatile blackjack strategy tool.
However, this does make it ineffective for variations with different house rules, such as Spanish 21 and Pontoon. It can be used in variations in which the game play is the same as regular blackjack with the variation coming from a side bets. But you should not be playing side bet variations anyway.
What makes basic strategy the easiest blackjack strategy tool? It is because the hard work has already been done. All you have to do is find out what play is the best recommended for the hand you have been dealt against whatever the dealer