Okay kiddo, so you know how sometimes people get into arguments and they can't agree on things? Well, sometimes these arguments can be really big, and they might even end up going to a special kind of court called a "litigation" court.
Now, when someone goes to this court, they have to come up with a plan on how to argue their side the best way possible. This plan is called a "litigation strategy."
It's kind of like a game plan that the person and their lawyer make to help them win the argument. They have to think about things like what evidence they need to show, how they are going to present it, and who they are going to call to testify (that means speak and tell the truth) in court. They also have to think about how they are going to argue against the other person's points.
It's kind of like playing chess - you have to think many moves ahead and plan out how you are going to win in the end. But instead of chess pieces, they use legal arguments and evidence.
So, a litigation strategy is like planning how to win a really big argument in court!